if you're handy with a welder or know someone who is you can make them. I have 2 chubby's sitting on stands I made. Stands are 24 inches high made with 1/8 in angle iron. I made them so they bolt together for ease of storage. I also added a hole so the smokers can bolt directly to the stands.
As far as being top heavy...its gonna depend on the size of the cooker...taller like the Party vs shorter like the chubby or fatboy. I have had no problems with smoker wanting to tip over...I actually have to work at it to get it to lean so I can move it.
"No excuses...just make IT happen!"