Dennis is right about the 2 types of saddle, the GM-8SP is designed for the older and now defunct "C" Series dovetail plates, the GM-8SPD is now the standard saddle for the industry standard "D" Series plates.
Be aware the Losmandy is pretty tardy in answering emails so it might be a while.
This is the new "V" Series page.
http://www.losmandy.com/v-series.html
Also, if you want to go from CG5 to Losmandy, ADM has a saddle that will apparently do the conversion:
http://www.optcorp.com/product.aspx?...5-216-217-9704
Cheers