A few ideas for a stand are the round discs from a farm plow. Weld a section of 2" pipe to mount the meter. The patio umbrella stands work well too. Just slide in a 2" pipe or I use the 2" PVC Conduit. I use conduit a lot because it looks good, does not rust, easy to cut and the meters fit perfect on it.

2" threaded pipe and a flange works well but will still tip over if bumped hard. Unless you ad a little more base to it. Then rock solid. Here is a stand I put together for my friend Bob.
Mike

Bob's Duncan 002.jpg