Electric steps replacement

I tried posting this on the C forum, but not a lot of success. I need to replace the Kwikee Series 38 Electric steps and I'm having a hard time finding them, at a reasonable cost. The RV Parts Supply Co. website shows the steps, but the company hasn't responded to any questions....has anyone used them to get parts? Other websites don't show the model I need. I replaced the motor a few years ago, but now need the entire unit. Any experienced input would be appreciated.