Hi Allen, I have installed “eyeball” gasper valves. I’m in the process of finishing my panel restoration now. The gasper valves I chose are from Aveo Engineering and are the AVE-BVBLK-001, AVE-BVBP-150 model. You’ll need a Y-adapter to install two of them.
https://1drv.ms/i/s!Apiok8NRRsL6nZlEw1i37lebxXS6FQ
Rick