I would try. A larger plate in the back (inside), and maybe on the outside, so that the plate overlaps with undamaged plastic could be good. Non-rusting material, like aluminum.
One challenge will be getti8ng at the inside. I repaired a Looksha Sport rudder that I snapped the bolts off on. Was a total pain to work on the bolts inside the rear hatch. Used every socket extension I had and even then was stretching to reach it.
Kayak & Canoe Covers
URCHIN Portable Anchor
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