Don't know about compatibility of the Chinese clone with the original, but assuming the grips are 100%…
Sig Sauer's E2 conversion is an option. Don't like 'em, but maybe you do. Sig went with this update partly to make the P-series grip less fat, so if you find it fat, there you go.
Sig rosewood are pretty, they came on some of the Elite series. A little fatter than regular.
Hogue rubbery finger groove ones are out there, if you like Hogues.
Also from Hogue, the thin black aluminium ones, also on some Elite models. Slimmer than regular.
Heck go to the Hogueinc dotcom site, they got G10 as well, with aggressive checkering. And the Al models anodized in different colours.