I recently bought one for one of my bikes, and it was way too long so I had to cut it down. I think it probably stuck >6 inches out at it's lowest setting, so I think that you'll be able to find a long one. I bought mine at a local bike store so I don't know the model or anything.
Incase you don't know, you should be able to raise the stem somewhat, by loosening the top bolt and just lifting the handlebars up. There should probably be a minimum insertion line you don't want to go past though