Well at least in the most primitive (I say that because there might be some fancier solutions round and about) way the dent can be pushed out I think. Won't guarantee it but it's worth a try since you really cannot mess anything up or make it worse if you're careful. I had a little bit smaller dent in the opposite corner of the bumper after hitting a car in a pretty slow speed (next time I'll change tires way before winter months!). And it was pretty easy to push out. Just get your hand behind the dent, either from under the bumper or from above (means taking off the headlight) and start pushing it. Meanwhile use a blow heater (or anything that blows warm air constantly to the spot) to heat the part of the bumper a little bit on the outside. Be really careful with the heating though, you don't want to give it too much heat, just enough that you'll feel it will go pretty easy to push in place. The end result might not be perfecto, meaning it might not get into exactly the original shape, depends of course how much time you put into it. On mine the average non-8L owning person wont notice it probably (if the paint scratches are excluded).
That will get the dent out, then it is just a matter of painting the bumper, have no idea how much that costs in your location. But I figure it can't cost huge, primarily depends on the place you get it done. I was kind of lucky, since the paintwork on mine stayed mostly intact. There were some minor lines/micro cracks in it but since my car is silver it doesn't stand out really and there are enough scratches from previous owner on the front bumper and rear bumper that I won't bother fixing it until I can get everything done.
