Glenn,
My experiences with Power Gear over the years that I needed them has been awesome. When Power Gear allowed you to talk with them it was even better, but now you'll have to do the email thing OR go to a dealer that has an in with them. I think you already know this.
That being said, you'll pay TOP dollar for replacement parts if you go to a RV dealer. If it doesn't bother you then I would buy a bubble level and stick it by the Power Gear pad. I would then take the coach to a parking lot and make sure it was level. Then adjust the bubble level so that the bubble was in the center. When ever I needed to level the coach I would do it manually using the bubble level.
To me, this would be the best and most cost effective way to level your coach. I think you'll find replacing part's from Power Gear will get very expensive. Not including the troubleshooting / part swapping to figure things out. Unless you have plenty of money and want to repair the system with new parts....YMWV
-paul