I got some nice hot orange Bucktail of Steve Cooper - Cookshill Fly tying. I specifically asked for the nice wavey stuff as well (best to give him a call)- as some of the pre-packaged stuff you buy of the major fish websites you can't always tell what you'll get and sometimes it's very stiff. As suggested above, Sean Stanton's Franc n snaelda is another good source.
Not sure on the colour you're after but the Orvis bucktails are the best I've tried, I think KGM has recommended them on here previously.
I also got a decent Blue bucktail from Cookshill at the BFFI show last weekend and I've bought a few off him previously. I'm sure if you ask he'll pick one out. His are good and mine is HOT orange but the quantity of nice soft hair isn't as good as the Orvis ones I've got.
Had a look round the Frank n Snaelda stand but only quickly and didn't see his Bucktails