Part number help

I need a part number for the window channel for the front of the door window on a 75 pickup. Can anyone help? Thanks!

Dan, These pages may help, if not there's more info on gangster in the library section: I'm not sure which part.
https://app.box.com/s/otkihx6yoa/file/594461503
https://app.box.com/s/otkihx6yoa/file/390081026

Kevin, Thanks for taking the time to look. I forgot about Irish Mikes site or I could have checked myself. I found out what I needed to know. Thanks, Dan