90 300 Tdi Auto

Hello all
I own an ex MOD 90 300Tdi Auto, it has series doors and windows the front RH window has lost its slanting anti rattle channel which allows the sliding window to open and close and keeps the wind and rain out.
I'm having trouble locating a replacement does anyone know where I can get one or know how to get around this problem.
Any help greatly appreciated

I redid the rear sliding windows on mine using the window channel from here Woolies Trim

It can take a bit of persuasion to get the felt channel under the window glass, but some sliding back and forth usually gets it done eventually.