I also found a pair of "Russian" grips on GB for $35...Very nice; no bubbles, no warping, quite solid. Mine fit my DWM commercial; haven't tried them on anything else...
I also got a pair of the accursed cast resin grips in a 3 for 1 eBay deal; they are worthless...warped, don't fit, and hang over the edges...(Actually, one is straight; the other bends up like a potato chip)...