I'd doubt it. Your 2nd link shows a reflex sight fitted on what they say is a 12mm dovetail (bit of an odd size that, as seen on the HW45/75).
So yes, your CP1 rearsight might fit straight on, but the PP700's ported shroud would have to be removed to (hopefully) reveal a CP1 barrel underneath that could take the CP1 foresight.
If so, I'd definately be interested. Although it might require buying a CP1 and a PP700 to effect the change of sights - leaving the CP1 with a red dot as a Co2 plinker... at import prices, perhaps £200 for the pair? (and sell on the CP1)...