Knockoff motor upgrade for #42099 4X4 X-treme Off-Roader?

I got this set the other day, and honestly it's kinda rubbish. Technically cool, but it's everything but extreme in performance. I paid $50 for it, which I'd say it's worth, but the guy who bought it first can't be happy. I read that there might be better motors, but original Lego ones seem to cost more than I paid for the car, especially if I need more than one. Then I got some Banggood ads for the Mould King brand and thought it might be a good idea to look east. Are there any good...