glass or door hardware

[newport72]

gonna try and upload a couple photo's. 72 Newport 2 door hardtop. on the rear bottom corner of the front door glass is a potmetal piece that rides in the channel. does anyone know what its called? as I have tried glass upstop window guide rear glass channel guide upstop and nothing come back. figured maybe no one has any for sale is to why there not coming up under these discriptions.

 

[polarus]

Some of the names can be complicated, I have a 72 Polara 4 door sedan, I don't recognize this piece. 72 parts book lists a part called " support and channel front door regulator arm pivot", it's listed for two door hardtop/fastback only, part # 3581867. I'm not sure if this is the right part because there is no photo or drawing to compare it to.