Zodiac Open Pro 650 rear collar patch

[650openpro]

Couldn’t find within forums here but hoping to be pointed in the right direction... I have an open pro 650 and the rear ‘collar patch?’ (slots into a housing near the transom) has broken away on one side and almost come free on the other. Does anyone know of a patch kit available with the collar attached for replacement? I’m hoping someone has come up with a larger more sturdy modification as I’m sure this must be a common problem...