Mike - Here's what I found from the Filling Station that should fit your truck. Description does say these are slightly larger diameter (1-3/16 vs original 1-1/8") but should fit.

You can also find them at several other of our usual vendors like Jim Carter, Chev's of the 40's, Classic Parts. Gotta run this morning, but if you need more details let me know and I will add more links later. wink

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)