Devore Gibbon Drivers?

Anybody know what driver's John uses in his Gibbon 8's? I am looking at possibly "diy" a center channel since my current finances cannot afford one of his other designs.

I realize this might not succeed since the crossover will be different but I may give it a go anyway?

Thanks in advance for your time. Regards, Jeff

both drivers are seas the 6.5" is not avaiable to the public yet{oem only}.The tweeter is 20 mm h 830 @ 23$ from madisound. Remember that the crossover and the cabinet are very important and this manuf. uses special series crossovers as does freid