This is the activation board inside the operation switch for the 1955-1957 GM 2 speed wiper motor.  It is uncommon for these to break, but it does on occasion happen.  I have only seen NOS replacement switches for sale, and some over $100.  I have used these in several builds with zero failures.

By the way, I've linked the ebay listing, but please feel free to contact me directly if you would like to purchase one.  I can take all forms of payment directly.

This is the hook inside the park switch for the 1959-1964 GM wiper park switch.  This is the piece that, usually when broken, causes the motor to give a loud click, but not come on.  This has been painstakingly modeled and tested.  I've seen 3d printed replicas in the past, but they end up melting in the hot engine bay.  This is made of fiberboard like the original and will not melt.

I've included the ebay listing below, but if you would like to contact me directly, please do so.  I take all forms of payment.

This brushboard will eventually fail, just like the original one from the late '60s and early '70s.  This is an exact replica and has been tested and works perfectly.  I say that it will fail because of the design.  The brush rides on the brushboard and eventually eats it away.  The good news is, it should take about 50 years with normal use.

I've included the ebay link, but please feel free to contact me directly if you'd like to purchase this.  I take all forms of payment.

If you've ever taken the front plate off of one of these wiper motors, you now need a new gasket.  Mine are designed and ready to laser cut as soon as I receive the order.  They work wonderfully, and save you from clumsily tracing and cuting them by hand.  Hard to beat for $5.

I've included the ebay listing, but please feel free to contact me directly.  I take all forms of payment.