I think it mostly comes down to the 4th gen being released 18 years ago at this point and there just isn't too much upside to a company spending so much on R+D for a vehicle that isn't produced anymore.
I think it's a totally feasible idea but it'd have to be a passion project for someone. I would estimate the cost of custom molded housings, the extra body panel, LED running lights, projector housings, etc to retail for $800-1K easily.
IDK. Kinda makes me think about the front of a Subaru forester.