But Ben, you only have to get them to try a monkey meat tamale once and then they are hooked.
Seriously though, the politics can come in second to the economics. Even if all your local co-op is ready to deal with is produce and grain you can use the savings there to balance some of the meat costs from other places.
You also have the option of exerting a gentle influence in them, as they attempt to indoctrinate you into their world view.
If they are trying to build clients it might be a good time to sway them towards organic free range meats.

It might also be a good place to get the contacts to start a beef ring where you and some friends can buy a beef and have it slaughtered for you.
Even though one of you alone could never deal with a whole beef at one time, several families together would have no trouble at all.
Before refrigeration was common beef rings were common in the west. They were usually set up by people who were raising beef and each one contributed an animal in turn.
They usually killed once a week and everybody got their share every week.
With modern refrigeration and market beef this could still be done today. A meat co-op could be set up to buy wholesale carcasses and just have a once a week cut and wrap session.
It might be easier to just buy the primal cuts too. That is how most of your grocery stores buy almost all their meats now instead of dealing with cutting in their own store.