Does anyone know of a zimmerit set that will fit the rye field sturmtiger either Atak or Edwards or some other set.

The Eduard set is designed for the Tamiya Sturmtiger (I'm building one of those right now). It has some really close tolerances around the side-skirt bolts and the , hull ballistic cone bolts, so I'd be really surprised if it would fit anything but the Tamiya kit. I'm sure an aftermarket set for the RFM kit will come along soon. Tamiya also makes a decal based set which might be able to be modified-- check Sprue Brothers, they carry at least one other decal based zimmeritt set besides Eduard, but I can't remember who makes it. Or you could just make your own with a Lion Roar Zimmeritt set and putty.
VR, Russ