Jay,
I have a 60 size Stuntwagon all framed up and covered, and it came from a kit I purchased
from Tom Dixon. The kit was produced with a foam wing.
It's still my all-time favorite control line plane, mostly because they were popular when I first
saw large stunters, and man, were they impressive, with an unmuffled Mac 60 Redhead !!!
Noisy, fast, and exciting, especially to a young kid !
Check with Tom...he'll probably fix you up.
Of course, plans are readily available, both for the 30 size, and the 60 size.
Cheers.
Warren Wagner