You have a stock bumper under that. It just bolts on in some way that also involves double-sided tape. The extension is the highlighted bit in this picture:
So it's not that it won't blend, it's just that is won't match the side skirts and front end. Might look a little awkward is all. In all honesty, if you can, fix it. Those things are RARE and expensive. It would be worth it to fix it. Even just to fix, then sell the kit.