Just so you know, you can get a MAF calibrated for 42's, but there is no real point in doing so since when you have 42lb injectors you also need a chip. A chip will make your 90mm Lmaf word perfectly with your car.
85 is too big for a 75mm TB too. Do you have a 3.5" intake or 3.0"? A 76mm C&L will flow enough for well past the limits of the injectors and will match a 3.0 inch intake nicely. I have one which I would trade as long as you have a flange adapter and harness plug to go with your LMAF. The 80 and 85MM C&L's are not calibrated for 42lb injectors regardless of sample tube because they are just too different from stock to match up flow curves. ProM had a 75mm Bullet MAF that was calibrated for 42's but they aren't real common.