Help please. I tried calling MAC's parts with no help on parts. Their "Ford Guy" retired. I was looking for door window channel sticks to replace the felts with. My old channels look OK. I think that I can get away with just cutting the universal sticks to proper length. Does anyone know which would be the best to use? MAC numbers that I was looking at are: V45983vv, V459893ww, V45983xx. All are 5/8" at the back of channel. VV is 1/2" deep, WW is 11/32" deep, XX is 9/16" deep. I don't have any of the old channel to measure for reference. They are all 60" long cut to length as needed. Who else does anyone use besides MAC's?