Any alternatives to the DSE wipermotor?

[Rhino]

If anyone has used a standard GM wiper, what have you used as a switch? I'm using this in a '68 Camaro and would like to keep the switch mounted on the dash if possible. (For '69+ you can simply replace the turn signal stalk with one from the Wiper motor donor vehicle)
I have things mocked up with a stepper switch and a breadboard with a handful of various resistors. I'd like to utilize an OEM switch if possible, before I go down the path of trying to cram a small circuit board onto the back of my stepper switch and also cutting the dash to fit this new switch.