If you're not opposed to going with a mATX mobo, that will open up a lot more cases.
Of course, it WILL help if you mentioned what you'll be installing into the case as well as why you have the height limit.
Personally, I just looked around when I was case hunting for one that would fit under my desk. I have 22-1/2" of clearance between the bottom platform and the keyboard tray. I knew the case would have to fit in that amount of space, which is a hell of a lot easier to do then under 16-1/2".
If you have a place for it, consider the Antec Aria case. It will require you use a mATX mobo, but unless you plan to use more than 3 PCI and one AGP card, that shouldn't be a problem.
BTW, just looking on newegg for ATX Mini Tower came up with the Antec
SLK1650 which is
16.6" tall. The search was VERY easy, and should have been one that YOU did.
How about next time you at LEAST do a real search before asking US to find your sheit for you.