Thanks for the info.
Here are 2 that I found but I don't understand the difference between them.
Does the more expensive one have a backspacer?
If you already have a DSLR, why don't you get an adapter for THAT??? For example, I have used this one which mounts directly to my camera body and fits into the standard 1.25" eyepiece mount on my telescope. I had to get the adapter with the longer body to move the mirror far enough away from the telescope's focal point, but it also comes in handy to be able to drop eyepieces directly into this to increase the magnification. Just make sure you get a metal adapter (there are some made of plastic) so it doesn't break if your camera isn't vertically over the telescope.