The one that comes with the Tapco stock is fitted to the contour, angle, and thread of the stock. I suppose you could get creative, talk to Tapco, and see if you can get a replacement for the screw that holds it on, and buy several aftermarket grips to see if you can fit them to that stock somehow. I use the supplied SAW grip and it's great. I keep the sight adjustment tools in the compartment, wrapped in plastic.
I did the Tapco compliance kit, Tech-Sights, thinner front sight post, a Kivaari trigger, a Tapco bolt, I cut off the bayonet assembly and put on a Magpul rail in the bayonet slot, a Magpul AFG, and a vertical grip with a bipod. The only part that really hasn't worked was the Tapco bolt, and maybe if I played with it, it would work better. But it didn't agree with the Kivaari trigger.
Next step; Duracoat in ACUpat.