There is no "daytona style" handset for the zenith movement. You can modify the genuine rolex hands to fit zenith el primero.
7750 hands cannot be modified (hole size way too big)
El primero 1,5 x 1,0 x 0,2 (0,2/0,2/0,22)
7750 2,0 x 1,2 x 0,25 (0,18/0,18/0,18)
The hardest job is the centersecond.