Try the $3 Bridge Serendipity:
http://www.blueribbonflies.com/merch...s_nymphs.shtml
Learned this one when I was in MT this summer. Very easy fly, and can be tied in a ton of colors. Basically a thread body with gold wire counterwrap. Head is elk hair (less is more) instead of a wad of Deer Hair like the traditionals.
Try tying using krystal flash for the body for a different approach. Also, for a "hard body", you can coat the body in Hard as Nails or head cement for added durability.
Best fished in tandem, a true killer even here in the Southeast.