repairing floats

Hi, I don't know where to post this question so I will just try here. Does anybody here know how to repair water floats. I usually use them in the pool and behind my boat. One hole is 1.25" in diameter and there is a tear that is 4.5" across. I am looking for a really good patch kit to. They are somewhat pricey water floats so that is why I want to repair them. If you can help then thank you.

Some waterbed sales places sell patch kits made to repain waterbed mattresses that have torn--I'd try that first.

Janet