Switching from a manual foot pump to electric

I'm doing the same thing. I had to replace my Firewall bulkhead connectors (another story), and took the opportunity to run the control wire for the windshield washer pump motor per the factory electrical diagrams. Should be a brown wire run from the wiper switch thru contact M of the bulkhead connector and to the pump. The other contact on the pump s/b grounded. My problem is finding the correct wiper switch.......