Nearly any new regulators come nitrox-ready, so long as you're breathing EAN40 or anything less.
In terms of ScubaPro, they manufactured regulators specifically designed for nitrox about ten years ago. These came with yellow and green plastic covers on the 1st stage (see my avatar).
Many divers use scubapro regulators with nitrox, and I'm one of them. SP manufactures very high quality regs, they are certainly "nitrox-ready" (regardless of the color of the parts these days), and if you select SP regs they will serve you well.
Hope this helps.
Doc