Levi’s Shrink-to-Fit 501s $32.95 on Amazon
I recommend sizing up about 3" in the inseam, and maybe 1" in the waist (or even none). My actual measurements are about 37×33, I usually wear a 36×34 jean (denim tends to be a bit vanity sized), and I wear a 36×36 STF comfortably. The waist will stretch a lot – if it shrinks more than you expected, put it on damp and let it dry on you. Just be careful not to stretch out the knees.