CSA Air (call sign "Iron Air") does some FedEx feed in Grand Rapids, as well as other locations in the Midwest. I did a Wings of Mercy flight a few years back (quite a few years, actually) with one of their pilots, and at the time they were paying $40K+ if I remember correctly. Don't quote me on that, but that's what I recall. Good schedule, home every night, short hops - not a bad gig actually.