I'd have a chat with Charlie Kimbell at Leicester - new school, nice S2C. Charlie is a good chap and their prices look just right.
Dont know if he can give you an AOPA cert - but he will give you quality instruction from a good aerobatic competition pilot who also happens to be an instructor!!
I'm not connected with the operation nor biased as Charlie has never beaten me in comps!
Hope this helps.
Stik