Kev,
I somewhat doubt it... as with all the 530 sprocket conversions on this forum, the front-sprocket always used to be a one-off.
But as it shows, the guys on the forum have to learn something new for their 530-conversions, as your info is obviously correct:
XS650 setup:
http://www.jtsprockets.com/catalogue/model/2501XV920R/TR1 setup:
http://www.jtsprockets.com/catalogue/model/6508Alright and once you start digging, it gets even better:
Suitable front and rear sprockets are fitted to XS500, XS650, TX750 - all in 530 dimension!
So yes, that's an off-the-shelf-sprocket for our old ladies and even the rear one matches the pattern. Thanks for bringing this up!
@Gredner: Hier gehts um das vordere Ritzel, das Vorderrad könnte da ein bissl groß werden, wenn du das auch noch im Kettenkasten unterbringen willst.

Cheers / LG
Greg