Looking for 70-73 A Body Bucket Seat Tracks

Thanks.. I thought the Cat Converter hump started in 74.

Looking for 70-74 Driver side seat tracks. Will pay CASH and/or trade a set of 75/76 Driver side seat tracks (In great condition) for them.

Anyone?? I know I could get a full set of re-pops for $400 but hoping to find something a lot more reasonable than that since I just need one side.