Marschal light weight grips, 10 round mags, replacing the stock recoil spring, and the flush 75b spring plug should get an SP-01 under 39oz. I am running original 19round mags in an '06 3 slot gun, and make weight with those things done. The 10 rnd makes are a good bit lighter than the 19 rnd mags. As the previous poster said, you could go for a Phantom, but I would go with a 75SA or 85 Combat if shooting just ESP.
My CZ factory tour with Martin Kamenicek, CZUB team open shooter....