MikeH:
I was poking around for something else and found this:
http://www.asedeals.com/Ranger_floor_jacks.html
Scroll down to the Model RFJ2TX. It's similar to the AC jack but not nearly as pricey. I don't know anything about the brand but thought this might be a more palatable alternative for you. These guys also handle AC. Ultimate Garage handles AC also.