This forum is supposed to be about helping, not chastising a request for help. Yes, they're just 90 degree covers, but if you've ever looked for one, you'd know they come in numerous widths and patterns, and few are directly interchangeable as a lot of custom castings and extrusions are used.
A google search on "pontoon corner caps" found quite a few, including some vinyl bumpers that might work out for you.