As a fellow tall guy I sympathize with your plight in general. I am 6'5" and still find that while their inseams for Walts say 34, they fit just right and have plenty to let out. I believe Mike has said like an inch and a half.
Also they do offer longs in jackets but they are special orders that you have to request. They are final sale though so you gotta be sure. Mike worked a long time with me to get the right size and the final product turned out great.