"John
I Highly recommend passing on the Safari with Velvet Ride as the suspension replacement parts availability is dicey. If the suspension is healthy (none of the tubes have failed) yes you can add air ride. There is even a kit available. The guy that bought my Safari was doing exactly that. IMO unless the deal is just crazy good I would just pass altogether."
Bill,
I know this post is late, but just so everyone knows for future reference, and not to scare people away from the wonderful Safari Coaches. In the very rare case that the torsion springs would fail, there is a company that makes the torsion springs and the shackles for the Safaris coaches with the VelvetRide torsional suspension. The company is Sulastic.
http://www.sulastic.com/books
With all the Safaris still on the road that are well over 15 years old, many over 20, I have heard of only two cases of complete failure. One was on a '01 Zanzibar that was replaced in early 2012, and one on a Fortravel. The one with the Zanzibar was extremely happy with his results, with the last update back in mid 2015. So it is not as scary and taboo as some might think. :-)
John