when you say a 20.5" or 19" is that the way Marin measured them then, or the way people do now.
I have a 1995 Marin IFT that's 17.5" c to c or 19" to the top.
It has the optional M4 forks that work well, the stantions are mint!
It also still has the WI cranks, Blue Marin handlebars, XT front & rear mech's, XT shifters.
It wouldn't take a lot to return to standard.
That was my plan but I need the space for a different project.
I'm from the U.S. and have a '92 Team Marin all original except the seat, seat post, and pedals. All XTR, great condition, manitou 2's need new elastometers. Bike was recently tuned, components all work great, wheels are true. Let me know if you are interested.