Any one have a MAF curve table for a ls4 MAF?

I know this is a long shot but I'm helping a friend put a megasquirt system on his BMW and he's going to use a MAF from a 08 impala. I've read the 08 impala used the same sensor and housing whether it was a 3.5, 3.9, or the ls4 5.3 I've not had any luck searching for the calibration/flow curve numbers for one of these MAF sensors. While I can tune his the old school way from scratch, it would be a huge time saver if I could enter the numbers into the tune and then just have to fine tune it.

I got the file but in Hptuners dont know if that works for you or not?