I was not able to find anything that met my criteria, so I designed my own adjustable height workbench. I also incorporated a mobile base into the design.
I built it thinking that I was building my "dream bench", and I was! After the designing and building process I wanted to show it off, so I entered it in a local woodworking exhibition. People liked it so much that I decided to offer plans for it on line. Those plans are now available. You can learn more about my adjusable height workbench design at my website: www.jack-bench.com
Please take a look at it and let me know what you think.