Depending on how crafty you are.
This guy will sail anything
A couple of tandum sailing configurations with oth SIK and SOT
KFS sells an outrigger kit. The site also provides some pics of Outbacks fitted with the kit.
Responce from Hobie on the Outback, when I requested similar information:
Glad you like your Outbacks.
It is something that we have been thinking about, but we do not have any
definite plans at the moment to put an out rigger on the Outback.
VP Engineering - Hobie Cat Co.
4925 Oceanside Blvd.
Oceanside, CA 92056
(760) 758-9100 x203
fax (760) 639-0684
Skype name: GKetterman
Hope this helps. J