I would suggest that you buy a gunsmiths screwdriver set to whatever your planed use and budget allow...same with your punches.
Cheap $20 sets can be had at outfitting stores and gun shops while more expensive sets can be had from Brunnels and Midway, as for punches they need not be a gunsmith specific tool, any CanTire, Princess auto , car parts store etc. will have pin punches, brass punches and small ball peen hammers/ plastic hammers.
I personally use a $20 Winchest screwdriver set to supliment my extensive machinists and mechanics tools.