Windshield wiper ideas

[ETAModel]

Hey all, the '30 Fordor didn't have a wiper arm or motor when Edgar bought it, just a small hole in the windshield frame. When I asked someone at the club about it, they told me to just turn around if it starts raining!

I think the '30 had a vacuum wiper, but I could be wrong. The car has the 6 volt, positive ground system.

My question is; what's the easiest way to get some kind of wiper on this windshield? It doesn't have to be 100% P/C, just something that will keep the wiper turning when it occasionally rains here.

I may just use Rainex and be done if its gonna be a major expense/problem.

Thanks in advance.