ronsway,
After a check of a later 1929-57 Chevy Master Parts List (MPL) source here :
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0522.htm, the part number listed in the earlier 1929-41 MPL "3656527" for your "1941 AK" steering stops (same for both sides of the axle) is listed for "1/2 TON, AL, BL (1st Ser.).
It would appear what you need can be found on any of these vehicles, which widens the search pattern for donor trucks.
Sorry about not catching that fact when I posted the 1929-41 MPL data in you "Driveline" post
"ronsway" Driveline post .
Hope this helps find what you need.

Dan