I have had a few clients with similar experience to the OP. Once the warranty is up, Andersen washes their hands of it. Actually had one recently where we replaced some 9 year old Renewals that they would not warranty with the woodgrain interior blistering and peeling up. Not sure what the exact reasoning for the denial was, but I know that the current homeowner was not the original purchaser. Also, to be fair to Andersen, the my experience with warranty coverage has been fairly similar across the board as wood products go, with the exception of Marvin whom I've seen bend over backwards on more than one occasion, even when products were more than a year out of warranty.
Regarding a fix for the issues described, there is nothing you can do that will be anything more than a band-aid. Either reattach the original cladding with adhesive, or you could possibly have someone come out and clad it with custom bent aluminum, but neither option will be a long term fix, nor will it provided a stellar fit and finish.