In the time its taken to come up with a plan of action, you could have stripped back the covering, cut the wing apart, made new plywood center ribs, cut the holes for the spar, made a new spar from plywood, glued the whole thing back together and recovered the result, all for less than you'll pay for a new wing. And you'll be done quicker than it takes to deliver a new wing.

Repairs are easy. Don't be afraid to cut a mistake. You'll get good experience for the next repair job, and there's always a next repair job.

Good Luck
Brad