[bojan]

Originally Posted by peter_4059

Baader sells these conical quick change fittings (sounds like they are based on the Zeiss design). Look for Baader 2456321.

http://www.telescope-service.com/baa....html#wechsels

Yep, this looks like it EU56.00 minus 19% tax for the set (if I understood properly) is sort of reasonable.
since I didn't have the access to milling machine back in 80'ies, I did it (with help of a friend of course) on lathe, and the internal conical details were cut out from turned parts, as needed.