Hi,
I bought mine from a guy (ebay handle frank-n-son) in the UK who offers ESB, ROTJ and Jangos, but beware as his stuff, although vacuformed and fibreglassed is not of high quality and the contact with them isn't also the best.
I wouldn't recommend buying from him, unless you don't find something else and are able to work on them and modify them it's still a solution to work with.
If you do, I would suggest that you buy a kit and not an assembled one, because I f.e. had much more work in the first place to disassemble the gauntlets for upgrading them as I had if I started with a kit (and it's a bit cheaper too).