tail gate replacement

I have a 1976 chevy blazer K5 (the beast)

the tail gate has a roll up window and the hole assymbly is damaged pretty badly so i need to replace it-I can't find a new OEM tail gate so I was wondering if i could replace it with a standard tail gate and just change the camper out to have a fold down window- if i can does any one have any sugestions on a compatable tail gate & camper.

thank you much
Gary
USN