I don't believe the Trailair site has been updated to show the Equa-Flex system. I have read about the system on other forums, and it has been advertised in Trailer Life magazine for some time.
When I called to inquire about the system (about the time Lippert purchased Trailair) I was given a price well over $350 for the basic system. I called back in April, and the price is now $210, $46 more for the wet kit, and I think around $30 to ship. If you search "Equa-Flex" you will a number of articles.
After removing the old system and bushings, I am glad I made the upgrade. Won't try it out until this weekend.