I made my own from an old fork mounted on an old handle bar. I use 2 dial indicators I got from a used tool store. I mounted the indicators with straps and bolts from the hardware store. the whole thing cost $25, and it's just as accurate as any stand you can buy. The downside is that it takes a little longer to set up.
The biggest advantage is that, because I have the dials, I can graph the dial reading at each spoke location (on Excel) and get a picture of what the wheel looks like. I'm substituting measurement and calculations for the feel that devlops with xperience. So far al my wheels have been true and stable.