For light seals and repair info see
Jon Goodman sells a nice kit of precut foam seal material on Ebay and maybe other places
I have started doing my own work for the same reason I have these wonderful classic cameras but can't afford to spend $100.00 + on each to have them repaired. As for doing other peoples It can just get to time consuming for me to do most , even a Argus C3 can have simple but time consuming problems because it is so simple things have to be just right to work. Most of the challege in classic camera repair is being able to work with very small parts disassemble, clean, and reassemble with out damaging or losing anything.There are books on camera repair most are some what out dated but still very helpful. Ed Rommney's book is a very good if out dated one.