International used the same air ride from the mid 80's until 2003. It worked well and they are around every where. Hendrickson built one very similar to it. Here is a drawing of the IH corporate air ride.
https://www.stengelbros.net/Corporate-Air-Rear-SingleTandem-Axle-Suspension-Z-Beam_c_1256.htmlHere is a parts breakdown of what International used 2003 until present. There are lots of them around too. I have about a dozen of them. They are very similar to Freightliner's Airliner. We replace the main bushing and the track rod about every 500,000 miles.
https://www.stengelbros.net/Corporate-Air-Rear-SingleTandem-Axle-Suspension-Air-Beam_c_1257.htmlI am building a hauler for my RV. This is the 2003 and later International air ride.
https://photos.app.goo.gl/ozvzJSiePjHV6LRTAThis is a cut off with aluminum hubs
Screenshot 2021-08-12 004416