Anand.....
You're thinkin' OB 7's with open baffle subwoofers ain't ya! aa

We could do any and all options for the enclosures Anand, however, I would have to ask why you wouldn't opt for the curved sides on the enclosure? You're going to town on the rest.....
Honestly, you've seen the OB 7's in the flesh, why not let us finish them for you? We bust a gut on our finishes!
The finish we use if far more durable than anything you can buy from a home improvement center, and DIY results won't be quite the same y'know?
You could always buy the kit from GR and we can build you the enclosures, and save the cost of us assembling the crossovers and installing the drivers. There would be some savings there for you.

Just some suggestions to get you into a pair of 7's....

Cheers