U can send the slide off to be hard chromed (for around $115-$125), NP3'd (around $125, if I remember correctly), or have it duracoated grey/sliver from CCR for around $60.
As far as the texturing of the grip, that can get kinda expensive.
U will probably be better off buying your own gun and then having this done. Or, I guess U could look at some of the sights and Gunbroker. U may find one already done up that way that someone wants to sell.