Warbird Information Exchange

Further to my earlier post for information on the Curtiss Hawk 11, I'm trying to trace an early Wright 1820, a core R-1820F-3 Cyclone of 710hp or similar. Anyone have one available or know where one could be obtained?

Also, these style of two and three blade propellers, anyone know what model these are (apologies for posting links rather than photos, can never figure out posting photos). As follows:

Two blade prop: http://www.airport-data.com/aircraft/photo/142582.html

Three blade prop: http://www.aviastar.org/air/usa/curtiss_hawk2.php

Many thanks