lf makes a 44" Faction. its 100 bucks. also the new 2008 LF flat decks are super wide so your toes arent going to hang over. hyperlite makes longer boards but they are super narrow.
you will eventually move down to a 42" skate when you step it up to a concave skate. I have a buddy your size (he has size 14 feet aswell) who rode the reed 42 impulse last year and is now on the 42 sst and loves it.
so basically what im saying is you can get a 44" flat deck or 42". the 44" is just going to be more forgiving your first year riding. that big of a board is just harder to manuever for shuvs and to put on edge.