Need info on Blaupunkt Pro Comp 10 Sub

Hey guys, a guy I work with has this sub, which is a few years old, and wants to put it in his pick-up truck, standard cab Chevy. He purchased it originally from Best Buy and it was in a bandpass style box, which he said sounded terrible, and after seeing the box it really didnt suprise me, so I plan on building him a new one, if only I could find some specs for it. He's wanting to go with a ported box, which i agree with (personal choice), and the amp he has, which seems kinda small to me, is a Pioneer GM-X542. He has a decent Kenwood deck which will power the door speakers which he has yet to buy. So, any idea where to find some specs for enclosures for this sub?? Thanks, Tim.

Well, their customer support really sucks, not surprised. They said they didnt have anything on file for that sub because it was too old. So, anyone else here have any ideas?? Considering just building one or more until it sounds decent but a starting point would be nice if anyone knows of one. Thanks, Tim.