On Sun, 08 Jun 2014 13:32:37 +0100, Peter Taylor wrote:

If you say where you are then someone might be able to point to a
helpful shack or Alladin's cave.

I'm near HIgh Wycombe (Buckinghamshire).

Orbital Fasteners in Rickmansworth or HMF in Amersham. I seem to remember
there's a fastener place in Chesham, too, near the Lido.

If none of that lot can help, and none know anybody that can, then you're
definitely going to be down to specialists on t'web.