The 1947-1955 Harrison Deluxe Heater has a few small parts that our regular vendors do not seem to carry. One of them is the two rubber bumpers that are inside the heater that keep things quiet when you turn the defroster knob. They are 1/8" and I found two sources that I want to share so the next time someone needs them, they can search here to find them.
www.marshallshardware.com0505510 Rubber Bumper 1/8x5/16x11/64
http://www.marshallshardware.com/pr...0%20%20%20%20%20&kw=0505510&st=0www.steelerubber.comp/n: 33-0127-41 Rubber Bumper 1/8x5/16x5/32
http://www.steelerubber.com/glovebox-and-fuel-door-bumper-33-0127-41Both will work great. I do not have both to compare, but the Marshals offering is .69 cents each, while the Steele Rubber ones are $1. We all know that Steele Rubber is very hard to beat in quality.
The part I am having more trouble with is the 1953 Heater with the extra dual closing doors. There is a rubber blade that goes across the larger door. Haven't found that one yet. Hope this helps someone down the road.