Not sure if you're still here OP, but I've got some advice for you. You're going to get a lot of bitter responses purely because of the way you've worded your question.
From the way you've presented it, a lot of people are going to think you have the attitude along the lines of "I don't really like Jazz, I just want to cut it up and use it for samples". Many /mu/tants will resent that because they actually like Jazz, and by using and abusing it you're deteriorating the value of something they love.
In order to make "genuine" Hip Hop music using Jazz samples, the only real way is to actually enjoy Jazz and stumble upon these possible samples of your own accord.
To each their own, man. If you actually enjoy Jazz and are looking for somewhere to start or possible rec's to expand your library, I'm sure the sticky would have something good. Absolutley explore and find what you like and then use it to make something new by all means, but don't bastardise what many others hold dear.
(If you didn't mean to be a douche and just asked the right question in the wrong way, I'm sorry for that wall of text)