Man have I got a deal for you! These up front
Product SKU: 195465 ID: xsp65kit. NVX XSP65KIT. NVX FRING65 6.5" Speaker Baffle Ring Kit. NVX XBAF65 6.5" Speaker Baffle Ring Kit. NVX SDRLR1 Sound Damping Rubber Roller. NVX SDRLR2 Sound Damping Rubber Roller.
These in the rear where you have openings for 6x9
NVX XSP692. NVX SDRLR2 Sound Damping Rubber Roller. NVX SDRLR1 Sound Damping Rubber Roller. NVX SDBSK2 1.38 Square Feet Damping Kit. NVX SDSK2 1.38 Square Feet Damping Kit. NVX FRING69 6x9" Speaker Baffle Ring Kit.
I have both, BNIB, $225 shipped!
Another option would be:
High end Front $200 off on sale:
Rear $125 regularly $200
All depends on the goal and the budget.