My contact over at Northeast Silk Screen today informed me that my needs are outside of their capabilities, but they did point me in the direction of another company that might be able to help.
So I have contacted http://www.schillinggraphics.com/ based on a recommendation from them. I have emailed them this morning to ask about getting a screen made for the body suit fabric, and also for getting it printed up. I've decided I don't want to handle that myself.
I am also still working another angle on the body suit fabric, but just want to hit it from two directions to see which one comes up first and/or best.