Aerostich will custom make stuff, and they carry very nice tall items. I have the AD1 (a Darien overpants style) pants in a 44X36 size that fit well.
The First Gear Kilaminjaro Jacket is a good fit I think in 2 or 3XL tall @ 6'7" 280lbs.
05 DL-1000 - A farkling project in the making....
"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.” – George Washington