Drivers side window leak

[Rig Mullin]

Have had a problem for years with leak on this window. Recently saw that I could look through from outside at one upper corner between window frame and coach wall. Somehow the window had shifted. I was told that opening had been cut too large at factory and window had now shifted. The window was removed and shimmed and reinstalled. It has shifted again and leaking again. Inside paneling below window is delaminated and rotted out. Unlike window on other side this one only had 2 bottom weep holes(other side has 6) and wondering if water is also getting in around bottom as well. I seem to think that window should come out again and the wall framing under the window needs to be rebuilt and then have window reinstall. Might even like to get new window if I knew who made it. Any suggestions of the solution to this problem would be appreciated. It's an 02 Seabreeze XL on Ford chassis.
Rig Mullin, Maryland

[garym114]

It's probably a Hehr window. I have a 2000 Sea Breeze. The little slide window on mine leaks a little. I tried to get some more molded weather striping but all I could find was very large rolls. Nobody sold it by the foot.
Probably one of these styles.
Windows - Hehr 5900 Radius Sliders