I think it was Mavericke that did something like that on an SX/4. It actually looked pretty good. You would have to find either another grille (because of the gap) or make one that extended all the way down.
the front bottom of the body (cowl?) could be made into a more spoiler look...
and then there's a great place for fog lights where the bumper arms came thru.
it would actually be alot of work. but you could get some kind of Modern slim-line bumper (IDK, like off a grand am or honda, or something like that) and incorporate it into the front, or Just fibreglass the front till it evens out.
OR
leave the bumper and the car the way it is.