Skip,
Good Luck I got one of the old Zimpro fiberglass and sheet foam wing 94" 50cc Cap 21 QS thats older than dirt. 1988 I think.
There are no ARF Cap 21's out there, Hgr 9 and Wild Hare had the only Cap232 that was worth while in an ARF.

Great Planes 90 size Cap 21 is good , the old Bridi f'iberglass Cap21 that Great Planes bought and sold to Kitty Hawk aviation are good.
I sold my Cap 20L that was fiberglass and foam, 81" WS G-38 power , too much building for my taste, I thought I wanted to sheet wings
but thought better of it.

Good Luck.

JDS