Thanks for all the encouragement chaps! I certainly intend to at least have a go at getting this one up and running again. What's to lose? I'm knocked out by the really kind offers of potential replacement crts. That makes the whole thing viable.
I shall remove the dead crt, strip the cabinet out and give everything a huge clean-up. May as well take advantage of the nice weather and do it all in the garden.
I'll keep you posted with progress and pictures. Oh and yes Symon, any measurements or details you need I'll gladly supply.
Steve