Variable Wiper Alternative

I agree the system is wierd and there are dozens of different intermittent wiper switches. There is one on eBay right now that matches my number but it is 250 dollars gah. I almost choked when I saw that. That is when I looked into other ideas. I like the idea of the mustang switch because they are inexpensive. I had found intermittent wiper electronics but I could not find a way to se the park switch. I found a youtube video for an effects guy that uses wiper motors but his setup would not work to use it properly.