Hi hon,
I'm 6'3" and when I started down this road I thought I would never find cloths that would fit. Not just because of my height, I was also badly overweight, have large feet and a deep chest and broad shoulders.
That was then, I've lost almost 25kg(55lbs), found a store that sells wonderful shoes in my size and right now I'm wearing my first real cloths, I went op shopping like Laura suggests as I still want to loose more weight and don't want to fork out loads of money on cloths that hopefully will be too big in a few months, and it feels great to finally dress as yourself.
Oh and my doc told me discreetly that I have to start investing in bras, I didn't think they were noticeable yet :]
I wish you the best of luck, whatever you decide.
Hugs,
Sarah