Looking for used Salzman system

I’m looking for a used Salzman firing system (or at least a control board) with the digital display for rail numbers. I have talked to James about a new one, but since I would be using it for personal use once or twice a year wanted to see if anyone had a used.
I have a mint cobra system that could be for trade or sale separately. For the amount I used it, I just like the simplicity of a Salzman.