ADM Accessories makes a 13-inch long dual saddle with two clamp handles for $129. I don't see a picture of one on Anthony's website. It looks like the one for the G42 (which is pictured on the website) only with a different set of holes drilled in it.
http://www.admaccessories.com/DV_Series_Saddles.htm
"DUAL13-LOS Allows owners of Losmandy mounts to replace the OEM saddle with one that accepts both "D" Series dovetails as well as "V" Series dovetail. The ADM Saddle features a dual action spring loaded split clamp that provides a full 13" of contact between the saddle and the dovetail. Two large hand knobs are standard. The DUAL13-LOS has two mounting locations which allows you to mount the saddle either in a forward, center or rear position. The mounting holes are counterbored for a 5/16 socket head cap screw and are 3" apart center to center."
Looks like this (except the hole pattern is different):