Looking for some part advice

[RJBEATS95]

Hello, I am new to this forum and was wondering if I could get some insight. I bought a 1970 Chevy C-20 Pickup not too long ago and took it down to the shop to replace a cracked windshield. When the windshield came off, the mechanic found a bunch of rust on what I think is referred to as the A pillar, the pillar that makes contact between the cowl and the roof and also makes contact with the windshield. I have already contacted LMC and another local Chevy parts dealer and they both said that they didn't have the piece I was looking for. I was wondering if you guys knew of any places that I could find the part I was looking for.

Thank you
-RJ