Is the db series sub the same as the momo series?

Cause I want to use the 10"single bandpass box design for the momo subs. It will almost fit perfectly in my car. I'll keep the same air space but I'll have to change the height and depth from 16" to 14.25" and will increase the width from 18.6" to 22.1".

One last question: Can someone recommend a box builder in the Atlanta or north Ga area?