I made a couple out of torsion springs from a VW bug. The front of the old beetles, (Not Super Beetles) use a stack of flat spring plates in torsion. Some are about 3/4" or so wide, but four in the set are half that wide, or about 3/8". I bent one of the narrow ones up and used it as a tail wheel assembly and it works great on my 1/4 scale Giles. Sorry, I am not at home so I can't post a picture.

AV8TOR