Posted for <bjburr@mwheli.com>:

 Adam,
 Northcoast Technologies (Now Kelly Aerospace) has developed a rear mount 100
 amp alternator for the TSIO550 to power their electric deice system.  It is
 now certified on the Columbia 400.  I am not sure if the IO550 is similar on
 the rear of the engine or not.  I have been trying to get one for several
 months but the delay is that I have a 4 bladed MT with deice boots and they
 have only developed a slip ring for 3 bladed Hartzell props.  You may be
 able to buy the alternator kit separate without including any of the deice
 equipment.  I also know they won't sell direct to you.  Lancair Kits is the
 distributor.  You should talk with Tim Ong because I don't think parts sales
 knows about their relationship with Northcoast.
 
 Bryan
 N132BB