Product I'm looking for:
Eclipse 10" 8810.6 subwoofer, or the TC sounds TC7 motor that it uses. It's different from the more common TC7; this one has a top plate thickness of ~9.7mm (~.38"), OD of ~140.88mm (5.54"), and ID of ~81.1mm ~(3.19"). Still has dual 3/4" slugs.
Budget:
Cheaper is...