I am sure that is frustrating. I would guess they just don’t have the demand to stock every part for a 14 year old boat. It might not even be Bennington if they sourced the original parts from a supplier.
Another option might be to find a local 3d printer vendor who might be able to help you. My son-in-law has a small 3d printer and it is amazing what he can make. Recently he made a custom jig to install aluminum deck railings to posts faster which eliminated measuring.
I am old and easily amazed with the technology.