Troy, Jason, Bo, Mark and Dave
thanks so much for thos suggestions. I'll look into them more over the weekend.
And Dave, yes I had heard of the reversed 50mm lens before. I even went as far as trying it with the stock 55mm lens that came with the camera. It worked - sort of, but I didn't really like the idea of plastering tape all over the camera. Hence the exercise to try and find a reasonably priced proper lens.
Thanks so much again guys