I have built boxes for alot of ppl on here and else where and I can do almost anything you want for a fair price, if you wanna see some of my custom work, check out http://www.autogoboom.com and check out the install section
pm loneranger on here. he is very happy to do it for you. he has a 1200 dollar box building program that shows the best box designs for your sub. plus he makes them very affordable. i think he even use 1" thick mdf.
i live in lenexa, KS and me and my friend could prolly build you one and save you money on the shipping....we leave Kstate this friday to come home so we could have it built before year end. Email me at gregshorte@lycos.com or AOL IM me at GregShorte or him at KSUTweaker