To Marriss - Heat Sink For G340?

Is there a Gecko heat sink that you sell for the G340. What is
the "normal" mounting technique? If it helps I'll be running 56V to
the motors and I'm using 1/3 hp 100V servo motors, NEMA 43 frame. I
will be taking your advice of 3 to 1 reduction.

BTW - I searched the archive back for a year and I did not find
anything, yet.......

Thanks,
-jd