During my yard sale preparation, found 2 27" tubes, presta, Bell brand name I think. Free to anyone in Boston area if we can arrange meetup, or otherwise postage. (I work in Waltham).
Probably 2-3 years old; both still in box. One is still wrapped in plastic; other is just in box (never installed). Came from 80's Trek touring bike I sold a few years ago (520, I think).