I came across this shop in Edinburgh, everything is handmade bespoke. Here a link to the page with accessories.

http://www.greenmansjewel.co.uk/setsmiscreg.html

The Skean Dhu's and kilt pins are outstanding.

I'm looking at buying one of the kilt pins for myself, I've bought a number of jewelery items for the other half and she has always been very pleased with them