I don't know about Luton, but you can get them at Home Hardware in Orillia. Have you tried "Helpful Hardware" in Twillingsgate? They're quaint and somewhat disorganized, but you wouldn't believe what you can find in the wooden shelving and bins at the back. I heard that someone bought a sextant there that dated back to Nelson's day, and fetched a fortune for it on Ebay...

- LH