where to find summer pants for tall guy

I'm 6'4" and about 210lbs; the 34x36 j crew chinos fit me well, but their linen pants only go up to 34x34 and I want something a bit longer. a lot of drawstring-y pants are sized only s/m/l/xl too so I don't know about those. where would you find pants in lighter fabric that work on a tall guy?
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