3-Speed / Variable Wiper motor + crank link

Hi Everyone,

I'm currently piecing together my 1970 Dart's wiper mechanism and the previous owner inexplicably deleted the old motor and crank link (likely due to the massive cost of a rebuilt 3 speed motor).
The car currently is wired with a Variable speed wiper switch with spray washer and I'm looking for a crank link and wiper motor that will work with this. If anyone has these that will fit with the proper year, I'd be interested. I'd also be interested in any 72+ motors and crank links if they can be adapted but it seems unclear if this is possible.

If nobody has these motors for a reasonable price, does anyone know where they can be purchased that doesn't charge $300? The only thing I've found so far is this classic industries motor but they'll be shut down for a month.
https://www.classicindustries.com/product/a40362.html