Woodsymatt,
I too have ordered the 132" Herc from Plamer but have not yet started const. I plan on using 4 RCV-90's turning 4 blade carbon fiber props 14x10 or so. the manufactour is designing them now and he will have to cut them down a bit to acc. for all that blade area of the Hamilton Standard. i'll include a couple of links. Sorry no pics yet. I didn't really ans. ur question but just to let you know that i'm having to custom make my own props. good luck. maybe try Zingerprops.
http://www.propellers.us/prop1a.jpg
http://www.propellers.us/prop1.jpg
http://www.propellers.us/prop.jpg
http://www.zingerpropeller.com/4_bladed_propeller.htm
Grinder.