69 Dart White Split Bench W/Headrest

I believe what you are refering to, is called by Laysons a Header Lock. The actual visor will slide onto it. I bought a new pair from Laysons at the Nationals last year for $129. pr. If your not in a big hurry, I do have a used pair of these. I cannot remember how nice they are. I have just had neck surgery and will be out of the shop for several weeks. If you can wait, I'll be glad to find them for you but If you need them PDQ, I would just get new ones.
Thanks,
Martin