The Greenhead brand of decoys hold up well to abuse. I use Deep River Goose Flute I like a bunch
I was given some custom calls from Prairie calls whichI like a whole lot more.

As HG said Craig's list and or e-bay is a good place to start. I ose a mixture of silloettes to full bodied to even some floaters for field - The Flocked head type decoys do make a difference at times.

JW