Still available through UNITEC is the Otis Type 7063E Governor, a 1/2" rope diameter application with 16" sheave. Sheave and weights sub-assembly and jaw kits are options for those 7063E Governors which have been neglected.
For 100, 125 and 150fpm applications, the Apollo type Governor (presently used on Otis Roped Hydro applications) incorporates a 12" sheave for 3/8" diameter ropes.