i can't recommend any specific model that will work with your car, unfortunately. i think you're going to have to fab something because the wipers don't operate like today's stuff. With the vacuum it's a pull and release operation, as opposed to a circular motion like on a wiper motor. I suppose you could make just about anything work, but you'll have to figure out how to mount the motor properly. I've seen kits available but they're around $300.
Specialty Power Windows (http://www.specialtypowerwindows.com) has complete kits, but like johnnymopar says, they're $300. Let me know if you find something better - I'm going to want to do the same thing on my 41 Dodge.
i installed a universal unit in 34 ford coupe. it`s from Kenny`s rod & custom in newton falls,ohio
phone 330 872 1932 that was a few years ago and it was only 40 bucks. the people there are very knowledgable and should be able to help you out. let us know how you make out. good luck .