erm............my SRX6 twinshocks have 18" as standard.....and i do have a front and back in good order, but you said you wanted a 17"? are you planning on fitting this into the standard SRX6 twinshock forks?
I do have a Yamaha 17" frontwheel, it's off a monoshock SRX i think, it's trispoke with mounting for a single disc, marked ' J 17 MT 2.50 DOT'
measurement between outer of each bearing 975mm (approx 3 7/8)
measurement between wheel hub flange extremety 1118mm (4 3/4 approx)
might need spacers making up, and an adaptor for the caliper, as the disc is bigger i think
cheers