Just got off the phone with a friend, was directed to the Bolly website - they sell single blade props. Only $21 to $23 a pop, or should I say, prop.

Still open to suggestions for other brands. But will be ordering a Bolly or two.

Would love to build a high speed aircraft for this Cyclon.
Anyone already doing this?

I would consider working with someone, trading a Cyclon for an airframe that is capable of very high speed.