Do they sell the official guitar controller for GH and GH2 separate?
 

If not, is there a decent and cheap guitar controller I can pick up anywhere?

PS2. I want to get the original game becaue of the ties to Din.

I plan on getting the 360 version of GH2.

If you mean do they sell it separately without the game prepackaged in, then yes. Also they have some other version, like the wireless model for PS2. You could get just the controller here http://www.redoctane.com/gh-sgcontroller.html Pretty sure also a cherry red model out too.

If you plan to get the original GH, why not just get it with the controller too?

Because someone offered me the game for ten bucks.

Ah makes sense. I would recommend Cherry red, think it's same price as regular one and looks better. Would say the wireless one, but if you plan to move to 360 for your GH needs, no need to spend the extra bucks for just the one game.

You could just get the 360 version. I'm sure they'll release all the GH1 tracks for download sooner or later.