You could try getting a Hawk trip. It's a bit nippier than the F4 or Lightning ("nippier" as in agile), but you would have to know someone who is current, at Valley or Leeming, to get you a pax ride.
The airline I used to work for used to have an arrangement with Valley so that (if we were really good boys and didn't argue about our rostas too much) we could get a trip on a Hawk. I managed to wangle a ride and it was a great day out. I'll probably get flamed for saying so - but it was remarkably easy to fly.