I am 46 and I would still love to find out what it is like to fly a fast jet...................
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.
And I know that this suggestion is going to be pooh-poohed by those who went through Valley on Hunters of Gnats, but neither of those machines could pull the G or stay airborne for as long. The visibility out of a Hawk is miles better than that from a Hunter as well -- especially the T-bird Hunter!