you can call comp cams or VT engines etc and tell them what you have and what you want. They will make you exactly what you need. I know comp does this for no extra charge. I'm sure VT will also.
Well, if I were you, I'd buy a pair of cams, not just one. But the stock PI cams do pretty well on their own. I'd get the blower on and tuned up before you decide to do a cam swap. It's next to no effort afterwards to pull the cams to swap them out later on anyway. The FRPP has to be the easiest Positive Displacement blower to install, bar none.