Looking for John Stockard Dulcimer Stand
General mountain dulcimer or music discussions
A keyboard stand makes a decent alternative also. The height is adjustable. I used a small piece of shelving covered with a piece of shelf-liner on top of the keyboard stand. This works good, but isn't real handy if you are taking it out to play.
I also made my own stand a few years ago. I could post a picture and some measurements if you want to make your own, or have someone that could make it for you.