If you're talking about a woodworker's bench, with a vise or two, dogholes and dogs, made for holding parts while working on them and a good solid, flat surface to hack & hew on, I don't understand the need to have the height range you specified, especially below maybe 30 inches. It's far easier to raise or lower your body - sit or kneel to lower, stand on a platform to raise, than to move the table top up or down.
There is a pair of bench "legs" that has a height adjustment range of about 18 inches, but they only go down to about 28 inches.
Now if you're willing to make a hole in your shop floor -
What's the 12 - 40 inch range for?
charlie b