I know the one is square the 1 is round,I am wondering has anyone ever fabd single cab doors to fit a quad cab?I can get doors off of a 2001 reg/single cab for next to nothing & mine are rusted out.Are they the same length?If so & you did this I'm guessing all you need to do is cut & fab.If you have any experience please let me know thanks.

 

You can get patch panels/skins to fix the doors you have. I don't believe anyone is reproducing the quad cab doors.

https://www.shermanparts.com/ecat/base/index.php

 

A good resource for used parts is Car-Part.com. It's connected to the Pinnacle and Hollander systems used by auto recyclers (did it for 15 years) and checks inventoried stock locally and around the world.