Hello Michael,
nice to hear from you. So I tried to get spoke wheels and I found an adress of the
company Maerz, in the village of D-Prüm - Niederprüm, phone: +49/ (0) 6551 / 4404,
cost for both weals aprx. 2.000,--DM

This was to expensive for me and I found XS 650 wheels at a really cheaper price.
But if you decide to drive without chaincover, you can use Frontwhel of SR 500, Rear of Honda CB 750 F6 with some new rim and spokes.
Or you take front and rearwheel from XS 650, used price aprx. 600,--DM.
If you are interested in the details, only give "smoke signs" by mail.
My adress is: GeU-BoH@t-online.de
By then,up to August in Roßbach.