Help IDing a part
 

I bought this guide for my pick up as the original wasn't in place. When I received it, it was not tall enough and the hole spacing was too short. This part goes inside the door as a guide for the window when it is rolled down. It is 17 3/4" long and the spacing on the mounting holes is 7 1/4"
It was listed for a 62-63 Chevy/GMC. GM part # 3812905
Any idea what this fits so I can sell it on e-bay or here if someone can use it.

I found my original one, it was at the bottom of the door, repaired it and it is back in position.