Not really small airfield Avgas-y type thing, I'm looking at... more medium sized airport (like, Blackpool, Bournemouth, Exeter type thing)... anywhere you could feasibly land/take off a PA31.
AirBP is an OK link, but they tend to be a the bigger airports that tend to have higher landing/handling fees. And because we have specific requirements for handling, I am trying to compile a list of airports that can accomodate us and provide fuel at a not-extortionate price.