"Men occasionally stumble on the truth, but most of them pick themselves up and hurry off as if nothing had happened" Winston Churchill
http://planetairgun.com/index.php
Joking apart, we have a great love affair with the North of the country, and have often thought of a move North of York. I used to do a lecture/presentation to the SOCO course up at Harperly Hall near Fir Trees, and one of the joys of the journey was stopping in roadside rest-places to see the wondrous scenery. Hereabouts, of course, there is totally b*gger-all scenery, which is why the locals make so much of the 'BIG East Anglia sky....'.
Truth is, there's nothing else to see.
tac
As an alternative if you are extremely patient you may be able to pickup a 2nd hand Forster Tap-O-Cap and make your own caps. They aren't made anymore and I sold mine years ago as I didn't have the patience to churn out any usable number of caps but they did work.
Its a punch/die for making the cap body out of coke cans and the ignition element out of paper roll caps for toy guns.
Dauntsey Guns and Fultons stock caps
A good supplier of black powder and caps Peter Starley Warwickshire, always very helpful.
http://www.black-powder.co.uk/order.htm
As I've yet to have a positive experience with Peter Starley, I'll refrain from commenting further.