Along with LL Bean, Land's End is a great place to hunt for 34x36 or what I see being called "Tall" pants. We are not Big & Tall we are just Tall.
Land's End Pants.
Note, if you prefer, Amazon.com sells Land's End as well. And the prices look cheaper! Good luck! Let me know of you find any of the pants to be exceptional. If I get a hold of any I will let you know.