How to/can a Gentile observe only eating Jewish-certified kosher meat?

[Director Michael]

It is further prohibited (but not as a capital sin), for a Gentile to take a piece of meat that he knows is forbidden and use it in some way to derive a benefit or pleasure for himself. This includes a person who feeds it to someone else who doesn't know it's forbidden, if he gets a benefit or pleasure from giving it to that person.

Given the above I understand that a Gentile should not have a share in a restaurant, or businesses, that sells rocky mountain oysters as food to the general public. As far as I know this kind of meat is a novelty available only in particular regions, probably through local arrangements between restaurants and cattle ranchers. If there are any major meat manufacturers involved with mass production and distribution then I understand a Noahide should not be a shareholder in such a business.

That is a good point. For the clarity of our readers, "Rocky Mountain oysters" are cooked testicles that were cut off from live male cattle, as the means of castration. That is an obvious current example of eating "eiver min ha'chai" (meat removed from a living animal):

https://asknoah.org/forum/showthread.php?tid=653

I would like to make one more observation. Please correct me if I am wrong. Noahides volunteering to eat only kosher certified meat also has several positive flow on effects. It appears this would financially support the Jewish people and the orthodox community involved with the kosher meat industry and retailers. Isn't it better that our meat budget can go to supporting Torah observant Jews involved with the entire process? I understand the supply of Kosher meat to some remoter areas will often depend on whether a minimum threshold of demand is met.

That is certainly available as a personal option.
(Note that some of those "remote areas" - remote from observant Jews - might be places where there is a family of Chabad-Lubavitch emissaries who are the only ones in the area who are regular consumers of kosher meat, so it is expensive for them to get it delivered, or they have to stock up infrequently with enough to last for a long time.)

For the same reason I like to choose an Israeli kosher wine to support Jews rather than other options even though it may be more expensive.

The potential pitfall I see is that the Noahide would just need to be careful that they are not giving people a mistaken impression that they are a Jew. For example, it would not be wise for a Noahide to have crab meat and kosher sausages in their shopping trolley at the same time, or buying the meat on a Saturday if this gives an impression it could be a Jew breaking the Sabbath?

I don't see it as a problem, if the Noahide doesn't dress like an observant or a cultural Jew when he/she does that shopping (for example, wearing a Jewish-style head or hair covering, or Star of David jewelry).

Noahides would have to be prepared to explain their position in detail as the question will always come up when a person advises they will not eat particular things. It would present itself as an opportunity to talk about this Noahide law and the Noahide laws in general.

I see your point in regard to a Noahide who chooses to buy only kosher meat, so as to avoid any possibility of unknowingly eating meat that is "eiver min ha'chai" (which he would not be liable for, being unaware of any problem with a particular random piece of meat, since it's only a very small chance).

The choice to buy kosher meat could be more conspicuous to others who see that, but the things to explain (if questioned) would be (a) the Noahide law itself (which does not require eating only kosher meat) and (b) the individual's personal decision to go beyond the letter of the law and choose the option to be extra scrupulous. by eating only kosher meat.