I just ran the 15" Thruster's numbers through WinISD. It calls for a 2.7 ft^3 sealed box. Ported and bandpass boxes get freakishly big (greater than 5 ft^3). This seems quite a bit larger than what you're looking for.
The Blueprint 1001 costs $79 and requires a .5 ft^3 box. Maybe Dave or someone else has got an e-mail to contact them if you're interested.
