Have a look in the pictures section (sorry can't remember which bit!) and you should find some snaps of the job GC very kindly sorted out fitting an ex MZ chair (squire dart iirc) to my XBR500SJ.
That should give you a starter for ten

Other than that I'm sure some of the experts will be along shortly to offer you better advice than I can, and possibly/hopefully even a pointer towards the direction of the pics

Otherwise I'll have a look myself next year

A Guid New Year to one and all,
Smudge