There is an ironmongers in Montgomery which stocks all sorts of useful things, and will sell you a single 2BA brass washer as well as what they describe as 'loose paraffin'. So when you are next passing…
That is Montgomery UK, the ancient county town of Montgomeryshire, roughly bang in the middle of Wales. Which is the bit of England which isn't England at all and sticks out in the West towards Ireland.
Cheers, Tim