Looking for negi in Tucson
Did you check Grant/Stone (oriental market located at the intersection of Grant and Stone)?
There is also a large market on 22nd St. ... G & L Import Export Corp, 4828 E 22nd St -- telephone (520) 790-9016. They have fresh lemon grass, et. al. and may have it. They are worth an annual visit to stock up on stuff you can't get elsewhere in town. Far away from where I live but worth a visit.