Welcome to PPRUNE and back into the fold of aviation. There is legislation in the offing under the EASA take over of licensing whereby PPL's will be able to instruct other PPL's and get paid and not have to get a CPL. The current JAR requirement has been seen to be both unworkable and unnecessary and has led to a big instructor shortage. Under the proposed system an aspiring instructor would do a ground and flight course after achieving a minimum of P1 hours around 250 or so I think. I believe they would only need a Class 2 medical. It sounds like you may be in luck. I don't know when it comes into force, and I would suggest get in quick when it does because there will be a lot of pilots in similar circumstances who will be taking advantage of the change. I wish you the best of luck and hope that you find a nice club/school where you can inspire new pilots.