Update, so I basically bought a SS CZ75B and shelved my (Pre B) CZ85,
After retiring now have time in my life to address the issue and get the CZ85 back up and running.
Just disassembled both guns and compared slide stops, besides the 85 stop being longer the pins are the same diameter...
Only the right side frame hole on the (Pre B) CZ85 is larger and that is the dilemma ...
When I called CZ they said it involved drilling the left side frame hole but that would require using a slide stop with a larger pin,
Checked CZ's website but could find no such animal ...
After noticing that a .22lr casing is the exact diameter needed inside and out made a bushing in about an hour,
Inserted a fired .22lr case into frame with the primer side facing out and pushed all the way flush with the frame, Next just trimmed it to length inside the frame with a Dremel tool, drilled the hole from the right side then sanded the face smooth...After that pushed it out and cut the spring groove,
VIOLA the CZ85 is up and running again !