Bassic, Goodwoods does mail-order all over the country and all they sell are British goods, teac, food, etc.
My niece's soon-to-be-mother-in-law in San Diego is from the UK. If all else fails, I can ask my niece to find out where she gets her tea.
Has she checked with any health/natural foods markets? Should be loads of them and there's bound to be some import shops as well which should have it. (We really didn't chuck it all over the side way back when in Boston, ya know?**BG**)