Hi Shurlock:
Forgive me, I thought you were referring to the 'windshield wipers'.
The pantograph shoes on my AEM7s are scratch-built. That process and the parts I used is detailed in the first post in this thread. The rest of the pan is MTH standard.
The pantograph shoes for my E44s are 'scratch-fabricated' from the stock MTH pan shoe with a Japanese brass pan shoe applied inside of it. The Japanese pans are excellent to use with overhead wire and just as good for parts, as they are well-built and have no paint to deal with.