I converted my MBX6 ECO using the following MGT7 parts:
MUGE2413 Foam Bumper
MUGE2414 Front Bumper Mount
MUGE2415 Body Mount
MUGE2541 Shocks (I'm actually running TEAM C front shocks all around)
MUGE2542 Front Carbon Shock Tower
MUGE2543 Rear Carbon Fiber Shock Tower
The best price online is nitrohouse.com. They usually have full stock, and ship within 24-48 hours from the time the order is placed.