Hello, I have a question regarding my 1984 VC Resolute wood stove. When replacing the stovepipe this weekend, I found that there were 6 allen screws with nuts on the back, 2 of which had seemingly disappeared. My question is – where can I find replacement hardware and if not application-specific, what grade hardware (material and classification) would be acceptable for use in a wood stove? Should I be replacing all nuts & bolts here with new ones? Thanks!