National River Supply sells a lot of the material needed to repair Hypalon dinghies, including the correct glue, they specialize in kayaks, river running rubber boats and the like, where repairs
are part of the joy of ownership
. River rafting is a bit more rough on rubber boats than tooling around the anchorage.
I replaced the tubes on my RIB
several years ago after some weasel tried to steal it but decided to trash it when he couldn't steal it.
The original manufacturer supplied the new tubes and I rebuilt it, not cheap
but then again, new hypalon tubes on the RIB
were $900.00 and made it like new, a new RIB that size was $2700.00.
The suggestion to recover the worn areas is a good one, try NRS for supplies.
A person with moderate to decent skills can do it, the prep is all important, once the glue is on it's do or die.
Buyer beware when it comes to used Hypalon, even worse if it's PVC.