Where to find rivets
http://www.rivetsinstock.com/
http://www.hansonrivet.com/
www.McMasterCarr.com

Yes, they should be done hot with a rivet hammer like in the old days.
I've done a few dozen between two different vehicles, it can be sort of fun but is a lot of work and setup too. Not something you'd do unless you absolutely have to, so if you can avoid removing good original rivets you'd be better off.

Grigg


•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-