Hi Mike,
I picked up a pair of rear drums for my '49 3600 from NAPA just last year. The drums are actually made in Provo, Utah. I don't have their part number, and it's a bit of a search through their books (not the computer), but they're readily available. $50 each. :-o
The front drums are a different story, and I'm still struggling to find a new pair (my right front drum is a little bit out of round).
