Lots of stuff on eBay:

Thread, Flashabou, Mylar Motion (like Flashabou), Uni GloYarn, EP Fiber, etc.

This Link will get you to the Fly Fishing Category:
http://sporting-goods.shop.ebay.com/...i.html?_npmv=3

Then Do a search for 'Glow in Dark' or 'Glow Dark' in the search box BELOW the eBay Logo.

bill