You poor sob, $575 for a new MAS for on fastlane. But seriuosly, IF you are sure it's the MAF, buy the part see what it looks like and replace it. The air intake should be easy to get at.

An alternative: take the part off and clean it. Usually there is crud/gunk on the sensor wire that the air flows across. If you clean it with some carb cleaner, it should work fine. I replaced mine last year, should have tried cleaning it first.

good luck...