Years ago I remember reading a thread where someone needed a diopter for their SLR. None were available, so they went down to the 99 cent store and bought a couple of pairs of reading glasses that were the right type. He then cut them down and popped one into the viewfinder. Worked perfectly. Bring your camera, and you could try one out for fun in the store to see if it might work. I can't imagine that it wouldn't. Should be easy to cut w/ a Dremmel tool, and the $2 cost is hard to beat.