There are basically two type of planers...in-line and mast boards. The planer boards that NCangler is talking about are "in-line" planers. They hook to your line and carry your bait out to the side. When a fish hits, it releases the planer so you can fight the fish. The planer stays on your line so when you get the fish close to the boat, just unclip the planer then reel in the fish as usual. They work great on smaller boats (like my 170CC) and you don't have to mount a planer mast (like your guide had in his boat). I use them for trolling for Stripers during the spring on my local river...they really let you cover a lot of water at one time...actually more so than outriggers.
If you are dead set on outriggers, there are several models that mount in rod holders or mount to your gunnels...a quick search of BoatersWorld.com brought up these:
http://www.boatersworld.com/product/477390439.htm
http://www.boatersworld.com/product/477731962.htm
Good luck with your search.