mbquart enclosure

I have a pair of MBQuart Q series QSD-216 6.5" component speakers and a pair of QSD-213 5.25" component scpeakers. I would like to mount them in my 93 lexus sc300 in custom enclosures. The current speakers are the stock 4" models that are in plastic enclosures. I would like to remove the plastic enclosures and make my own out of MDF. I cannot find the proper dimension for these speakers. I have tried MBQuart's support page many times but they will not respond to my emails. If anybody could help with dimensions on these enclosures i would greatly appreciate it.

Thanks
Chris