The best source I've come upon so far is Maks Maniga's Sajès Ayisyen (it's all in Creole)
But it might be best to collect the Haitian proverbs by googling the same name. You'll find a lot of websites with long list of proverbs. Many of these sites offer an English equivalent to these idioms. It might take some time before finding the perfect proverbs that you want to use, and the fact that they are spread out on different sites does not make it any easier, but you'll get acquainted with many of them in this way.
But it might be best to collect the Haitian proverbs by googling the same name. You'll find a lot of websites with long list of proverbs. Many of these sites offer an English equivalent to these idioms. It might take some time before finding the perfect proverbs that you want to use, and the fact that they are spread out on different sites does not make it any easier, but you'll get acquainted with many of them in this way.