Drilling & tapping 4 holes should be a hundred bucks or so. Be careful who you let work on it. I let a "new guy" work on one of my Mausers... the front holes came back too shallow ( the screws would bottom out and not hold the base tight. That problem was disguised with a generous application of loctight!) and slightly off centre.
If by "side push safety", you mean the M70 type, I don't think I've ever seen one for a model 96.
Keep in mind you'll have to have the bolt handle altered as well, unless you plan on mounting the scope very high.
If it were me, I'd get one already set up the way you want.