I was poking around on ebay and stumbled across the Sams for the Airline version.
http://www.ebay.com/itm/1957-AIRLINE...MAAOSw9mFWL~4F
It's a GRX-4030A which lead me to finding it on tvhsitory.tv.
I still haven't gotten around to fixing mine, but at least now I know what the knobs look like. I wouldn't mind finding the Airline version too.
