Well, of course this is going to cost more, but what about converting to the larger diff housing and axles? This would take care of those problems.
As far as a baffle goes, we need VAC to make a run of them. I am going to make one custom for a customer, but it requires me having the car for a few days to ensure it fits properly. VAC baffles are very nice, and much easier than custom fab!
E92 335i/6MT Dinan Stage 3: intercooler, oil cooler, intake, flash, exhaust, LW dual-mass flywheel.
Vishnu PWM methanol custom trunk mount, Diffsonline 3-clutch Salisbury custom diff, Ohlins Road and Track coilovers, Vorshlag camber plates, much more...
E28 M5 w/ buncha stuff, R171 SLK350