I have been looking at replacing my inoperative Bendix air cruise control with a King Cruise electronic system ($600 and lots of work), but came across a shop in Dallas that repairs the circuit boards and controls on the older Bendix. In response to my e-mail about the Gillig chassis air cruise made by Bendix here was his answer:
"yes,the cost is $315.00 + shipping. we will be back on the 30th ship this item to 2970 Blystone ste 104 Dallas Tx 75220 att larry"
He can be reached by e-mail at pro3g@aol.com. I forgot his shop name, but this may help others.