WTB 1986 CBX 250 RSE parts

Hi, any knowledge of any parts source, even a wrecking bike, (or also anyone with a workshop manual copy that could be downloaded) for a rebuild we are currently working on?

Also - anybody know if the slightly earlier RS (single cam) valves fit the (DOHC) RSE head?
Cheers.

WTB 1986 CBX 250 RSE parts