Windshield wiprt motor?

I have a 49 chevy 5 window that I am in the process of re-wiring with an EZ wiring kit. Since everything is being re-worked I want to replace the vacuum motor for the wipers... I am looking for some later model wiper motor that will fit?
If I have to replace the linkage in the cowl with some sort of transmission... I would be willing to do that. I am trying to find a model from a later vintage that will allow the new motor to just bolt in....Help!
Dean

If you wanting to find one in a bone yard, look at the Mazda truck.

We used to use VW bugs.....(not the supper)