Body mount coupler parts?

As I'm learning more about custom 3D printing some foreign locomotive shells and car bodies, it's becoming evident that I need a solution for body-mount couplers. I actually prefer the simplicity of truck-mounted couplers, but they are unrealistic for many locomotives. Is it possible for AZL to sell assembled body-mount coupler parts with the little screw? Or is this already available somehow? I don't care about magnetic uncoupling so I prefer an AZL coupler. I like the recent additions to the AZLDirect parts page including some chassis without shells.