Was planning on doing this myself, but don't think ill have time. I need a box for a 15 (either a nightshade or hdc3, havnt decided yet). My max deminsions I can have are 28W x 11.5H x 27D. I'm going to need sub up port back, obviously due to my limited height. I've been told ill have to use an aeroport to save on my volume since my box is so small. So if anyone here can help me out and give me some quotes, or if y'all have any suggestions on who can build one for me I would appreciate it.
Dustin aka Bassman3 builds some nice boxes from what I have seen. He should see this thread and post sometime fairly soon. Or you can email him at DLaudiotech @ gmail.com
Im also having him build a box for me for my dd1515. My max dimentions are slighty more than yours,but not by much. Maybe he could show you the design he cooked up for me.