By the time you find one for the 7.5", buy it, pay the cost of installation - even without changing gears - you are probably at the same price as just getting an 8.8 and swapping rear ends. Worst modding decision I ever made was getting the tlok and gears on the 7.5. Even with the LPW girdle all it took was a CAI, tune and set of drag radials to bend the supposedly indestructible Richmond gear pinion. When I picked up the 8.8 it was actually cheaper than what it had cost me to do the 7.5 build.
2013 MCA Convertible, automatic - Revelare Designs cowl hood, Hellion single turbo.