Advice for finding manufacturing partner for clothing on Alibaba (or anywhere else)?

Hope this is the right sub!

I have a 3D rendering of a particular clothing item that I want to have produced in quantities of 200-300 at a time. Ideally would like to have a few samples to make sure the item is made correctly, before ordering the lot. I’ve spent time searching across Alibaba and seems like most of those people are overseas and not willing to produce a few samples (understandable). Any advice/referrals for clothing manufacturers that do good work? I have no problem with globally sourced as long as the quality is good and communication isn’t an issue. My item is specifically to do with under garments. Thanks in advance!