The reset button on the odometer trip counter is broken. Any idea where I can find another one except from a junk yard?

Fixed the driver seat the other day. It was leaning over to one side and I thought maybe it is a bent frame, or any of the other suggested problems. Turned out that the hight/tilt adjusters, both front and rear, was out by one notch. It can't be corrected by pulling only one leaver at a time, because the other keeps it tilted. Now the seat moves easier back and forth also. The previous owner had cancer and sold this good car, keeping an identical old car. In the process, he swapped the good seats for the slightly cracked, and in the process probably got the hight adjusters wrong.

Note of caution: I bought the car the day after looking at it and driving it. The previous night the owner swapped out 2 of the good tyres for bad ones, swapped the distributor cap and rotor for faulty ones, and swapped the air filter for one that was so old and wet, water was almost dripping out of it. Found all this out when it was too late. When you inspect a car and it is all good, buy it immediately.