you can still get a box made from particle board from them, but they now use baltic birch wood for their enclosures. while i think they make some good boxes, i dont think they are quite worth the money. i had a quote for a 2 cube ported box with 2 4" ports using baltic birch wood and carpeted for $239 shipped. you can easily make that same exact box for less than $100. i dont know the exact prices on baltic birch, but im sure i could still build it for less than $100.
moral of the story: TCAB makes decent enclosures, but for less you can have someone here on the forum build you the same box, or for a lot less, you can do it yourself.