Try a bone yard then you can get other things you see that you didn't know you needed until you saw them there in the boneyard just waiting.

You can pull a handle and all the parts cheap. There are 2 screws that hold the handle in place, one is accessed from the outside (I think it has a plastic plug covering it) and the other is accessed from inside the door panel. I had to use a stubby phillips to get it out. After you have removed the screws you need to loosen the strike and then you will have enough clearence to get the handle out. Push towards the back and the front will come out. Then you will have to twist the handle up and out to release the metal rod that connects to the tumbler. You can swap out your tumbler and have a good handle to go back in. It is easier to replace with a key that will turn the tumbler so the metal rod will slip in and out of the locking mechinism. Hope this helps.
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If it ain't broke take it apart and find out why.
1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King
Ride in Peace Eric Peterson, Harley of Macon