Teamcherokee.com, Quadratech, etc. Generally expensive. I did all my stuff with used, u pull it stuff. The vertical divider channel is usually gone, I used the window surround stuff cut to fit, works great but is slightly wider than the factory stuff.
Remember all the Comanche door stuff is the same as a 4 dr Cherokee, the two door door stuff is longer ...
An excellent place to hang out is Comancheclub.com, lots of good info there, and Comanche specific.