The most commonly used damsel nymph here in the UK has a long marabou tail. This is often used as a lure rather than a close copy.
Simple damsel nymph/lure:
Tail - olive marabou tied long
Body - olive dubbing(either marabou or seal's fur)
Rib - oval gold tinsel (I actually use a fluo green floss)
Body hackle(optional) - palmered red game, badger, or ginger
Head hackle - partridge, dyed olive
Head - gold bead
It works whether the natural is there or not.
Closer copies can be made by shortening the tail, omitting the body hackle, adding a thorax and wing case and replacing the gold head with glass bead eyes.
I also find that a golden olive colour works better at times.
Another variation that seems to work well is to paint the gold bead with flourescent yellow/chartreuse paint. The movement and trigger point make a deadly combination.
For a golden olive damsel lure tie the tail of white marabou, body of white dubbing, body and head hackles of badger, gold head and then dye the whole fly in hot water, turmeric and a touch of vinegar - leave to soak overnight - DEADLY!!!
Hope this is what you were looking for.