You can reg pre made replacement panels. As said remove and treat all rust to prevent it coming back. If you can’t weld (and don’t want to learn) there are now automotive adhesives that can be used that are as strong.
Thanks for the website Bogie! I like that approach. So I get rid of all rust and damage. Then i can use an adhesive in these panels to essentially glue them in place? What would you recommend for under that area to fill or seal the area?