Replacement TRP Prop: Where to find?

I've got some knicks in my rearmost TRP prop, the R3 19P prop, and can't seem to find one anywhere for sale. Anyone know of a place I could purchase just that single prop (since my other prop is perfect)?

Also, do you really need the "Yamaha special TRP prop wrench" to remove the props? I heard somewhere you could just use a 1 1/16 socket wrench and it does the same job. That would save me 80$.

Any input is appreciated.