CoJoe,
I don't know of any Chipmunk shares currently available in that area, and may indeed be interested myself if there were any. In the longer term I have heard that Northants School of Flying, at Sywell, is considering a Chipmunk rebuild over next winter, with the intention of seeing what commercial demand they can get for it, or selling it / syndicating it out if sufficient demand does not materialise. Nothing solid, but...