thanks to those that have taken the time to respond. Looks like I will be calling Pooleys in the morning to get me an Aera 500 put in the post as soon as they get some in stock, hopefully on Wednesday.
What a pity I made a pucka bracket for the AV80R on my instrument panel and only got to fly with it once. The Aera 500 will need a different bracket, no doubt ...... guess I will be busy in the workshop at the weekend.