I have sent several to Ficken Wiper Service in West Babylon, NY and they have all worked very well. As I understand it he bought out the Trico factory and all the inventory. IIRC the price is considerably less than $100. I never rely on engine vacuum but instead use an electric vacuum pump from a Mercedes diesel which is way back behind the spare tire in the Mercedes so it can be mounted anywhere in the truck out of sight and just a hose run to the motor. Uphill, downhill, pulling a trailer, they will just keep running at ANY speed you desire.
