i have one for sale right now, I am tall as well, and the breeches is a Horka, black and gray full seat leather. Size is a 6-8 and for me too tight. Great condition, like new, long leg, super comfy....just saying......:-) price neg. around $50
Tuffrider! Also I think GhoDhos run long
Tailored Sportsman has a long option!
Ariat, and tuffrider. I am the same way and those are the only two that really fit me well!