I make all my own...only way to do it
I love tying a fly to a set pattern and then tweaking it and improving it. Great fun.
I used to dress an Iron Blue Dun dry with a blue tinsel body. Seemed to outfish the standard and was quick to tye.
Having said that, Fulling Mill flies seem to be pretty good...or get from Mike at Haddo..he sprinkles them with magic fairy dust!