I just re-did all four windows on my '71 145; the rear driver's side window channel (which the window sits in) had completely rusted out. I live in Atlanta, got parts at Voluparts (404) 352-3402. The channels were about $15. The front driver side channel on mine was still in good condition so I kept it if you still need it - do not have the rubber grippy stuff that secures the window inside the channel however ($10 at Voluparts). Trade? Hmmm... what I really need is a working fuel sender for that car, could use a good coolant expansion tank cap and a rear differential fluid plug too. Not that those three equal a window channel but one or two might. Lemme know