RockOla or Rock-Ola Vending machines seem to have been made by the same company that made the Juke Boxes of the same name for many years.
Most models are Single Price and were seen in many of the Frat House type movies during the 70's and 80's and as such are almost collected for Man Dens.
Many of the newer ones don't seem to have been claimed by the same manufactures as the name got sold and the product lines apparently split out. But there are some very sophisticated computerized multi Price units out there as well.
The limited Selection of parts we have, seems to be just about everything that is still availalbe for these machines.