Any stand alone skid plate will fit with the oem crash bars. However, the cast aluminum sump is what most skid plates mount to, and that is our weak spot, as a hard hit will either crack the sump, or blow out the mounting points, both causing severe oil leakage. If you just need a gravel guard, pick what you think looks nice and be happy. If you need a real skid plate, then it gets more challenging.
Altrider and SWMotech are good quality products, but mount to the sump, in part or totally. ACD fron spain and the Ride On ADV skid plate do not mount to the sump. The other option would be to ditch the oem crash bars and go with a Rumbux system, (more protection, also not mounted to the sump.)