atlantic towers: air tower 11 I believe http://www.atlantictowers.com/airtower.htm
Call shelley there, she will fix you up with measurements.
Monster tower make nice universal racks, $195 each shipped.
The racks are universal because they come with all the different sized inserts for differing tower diameters. www.monstertower.com
, brad there should be able to give you all the help you need. 770-410-3451
they are quick release and have a 5 year warranty.
Just about any brand will make a rack to fit though, maybe look at wakeside.com for ideas and pricing.
Hope that helps.