I've had these 1/4 scale Klett hinges for years. They look like a doorhinge.....very similar to the DuBro 1/4 scale hinges, only molded better.

When Goldberg sold out to Lanier, it sort of left Roy Klett hanging in the breeze. I'm not sure where or if you can buy Klett products today. A search on Google for "klett hinge" got some hits, but I don't know if those web sites are still valid.