Hi, Is anyone familiar with the "A-A1 Light Control Model for 1A2 Systems", made by the out-of-business TT Systems Corp? This is currently on eBay.

This device provides A-Lead control from station sets without the needed contacts. I'm looking for something that I can run multiple sets off of. There are 4 available on ebay for $50 ea (item number: 121209114950). Thanks for helping!