Tim: I found some hen's teeth. smile. The two remaining knobs on my heater door are exactly like the knob on the ashtray. Classic Parts has them for $7.49 ea.

Shame on me for not looking more closely and comparing the two knobs before I submitted my post.

Jerry

1 1951 Chev Panel with a 350 small block, automatic tranny.
1 2004 Chev 2500 HD pickup... stock
1 1950 Chev 5 window pickup; 261 c.i. engine, 4 on the floor.

With lots of time and money, any Stovebolt can be restored.