I'm afraid that shelters all over the country have got you beat there. They've got such a variety, it's crazy what you can find. Plus, they've got so many that even they can't find proper homes for all of them. It's tough competition, not worth your time, effort, and money really. So please, spay and neuter your animals.
BTW, it's a pretty stupid idea to mix two entirely different dogs just because you can. You have no idea how deformed and/or sickly the offspring will be.