6'3" height - 6'8" wingspan - 42" chest - 34" waist...send help, plz

WTF am I supposed to do with my disproportionate body. Suits are easy enough to get tailored, but I have yet to find a shirt (polo or button down) that fits properly in the chest, without having an enormous amount of loose fabric in the midsection and is proper length.

I've tried various tall and slim fits from Untuckit, American Tall, Land's End, LL Bean, Ralph Lauren, Banana Republic, J Crew, Brooks Brothers, Charles Tyrwhitt, and God knows what all else. They're all either too tight in the chest (to the point where I begin to feel sorry for the buttons) or look like a tent around the midsection. Sometimes both, while also somehow too short.

All suggestions are appreciated. Bonus points for Oxford cloth.