[Barry-ct]

I looked up the part numbers in my parts book and my book shows from 44-47 to be as following:

01C 8123200-A r/s Dennis Carpenter restorations 1-800-476-9653 Qty 4 in stock
01C 8132301-A l/s same place as above Qty 1 in stock.

I can only verify back to 44, as I don't have an earlier copy back to 38. Maybe someone else can look it up on the earlier truck and verify they are the same.
Dennis Carpenter has a separate division that deals in just NOS stuff.

Hope this helps.