mchan888 - Gary Dayton at Coherent Source Service would have the definitive answer.
More generally, I doubt that a black-centered driver is original. The CS7 had a black woofer with a donut-like center. The 7.2 had a white driver with white dustcap. The 7.2's drivers were new, built in-house and not merely upgrades of the 7s, so mix-match of parts is unlikely.
Let us know what you find out.