Right now, I've got replies and info back from AP in Canada, and the MTK suit found currently on eBay (sorry, no new info that hasn't already been said around here).
I live in Canada, so the AP sounds like a logical choice. However, I do have a 36" waist & 42" chest, so fitting it will take some shimming work. I've sent a request to ATA as well, to see what they can offer. Finally, I sent a request to AM, which sounds like the best choice, given my body size and type. I think that at 5'10", RT would fit girth-wise but may be too tall out of the box.