Well I found the right colors and gave it a shot to tie one for you. I think it can be improved on with a bigger hook and larger profile but it might work to fool a fish into thinking it was a grass shrimp.
http://i97.photobucket.com/albums/l2...assshrimp2.jpg
http://i97.photobucket.com/albums/l2...assshrimp1.jpg
The pictures are close but show them slightly darker than they are. In sunlight I think they will be very light and look very clear.
