Any stick for 360 should work on a PC with the right drivers.
http://www.arcadeinabox.com is on source, Trading Outlet should be another.
Sure. Required some know-how, but definitely possible. UPCB is one way, and the ‘2 pcb’s in one stick’ thread goes over how to do it without a UPCB.
You asked if it was POSSIBLE. I don’t know of any stick makers who use UPCBs in the sticks they sell, and that combination is a lot of custom work. Read the ‘How to buy a custom stick’ stickie in the trading outlet. This is Tech Talk. We discuss how to do it. If you want to know ‘Who can do it for me?’ you need to hit Trading Outlet.
Dude, no one answered the first time, and your thread was closed by a mod. Lots of ‘Where’d MAS go?’ threads have been popping up all over, including ones saying the telephone number got disconnected. Read those, do some googling, try to find them yourself. If you can’t, they probably don’t want your business.
And I’m pretty damn sure they couldn’t do the multi system stick you’re wanting anyways.