dukefett
Super Freak
The ANH arm won't fit the R1 version,as the pegs/fittings are different...but you could switch them (the pegs) around. The other issue is that the R1 suit is tight fitting so in order to switch the arm you'll have to strip vader down..
Thanks for the info, I jumped on an ebay BIN in the mean time that looked like a good price. So I have one if I decide to go that route.