AEA equipment of the late 70's

Is anyone using AEA stuff from the late 70's? They made two amplifiers which I've never seen for sale on Audiogon or Ebay. I wonder how many were made and sold, and what happened to the designers, ex-NASA guys I'm told. Their pre-amp was built to NASA standards and used sealed modules (containing IC's I think) and should enjoy a long life. Whether or not it sounded good that's another question. Thanks