I have an small Lownpro backpack I use when going ona long hike or a climb and I want to take just one camera a filter or two and extra film. I picked up a $30 (CDN) aluminum no name brand attache style case out of the local hardware store. Came complete with the cubed foam. It carries both the 35mm and the TLR, light meter, several filters and a bunch of film. It's not water proof, and a pain to carry if your "in the woods" but it sure takes a beating.
If I had the money, I would have bought a Pelican case.