did you ever find a set ??
where have you called/looked so far ?? not many places out there with vintage Chevrolet Goodies NEW or USED
Try the Usual Suspects USED/NORS*
Gary Wallace in Missouri [Lots of Used parts he can check for you]
.....Website:
Early Chevrolet Parts.....Phone:(314) 293-1991
*
Lonny Ekstrand in Texas
.....Website:
Stanleys Parts.....Phone:(817) 478-7265
*
Bob Marx in Wisconsin (Posts on here as marxparts) [Has some NOS/NORS/Stuff may get lucky]
.....Website:
Marx Parts LLC: Antique and Vintage Car Parts.....Phone:(715) 652-2405
.....email:
bob@marxparts.comother option would be to get a set made, they should be pretty easy, pretty simple sleeve.