I never thought about looking for Tagore’s works in English, who will waste time by reading a poet’s work in another language? So i never thought about english translations.
Then, after having friends from all over the world i realized that i will have to be a bit more elaborate about my favourite poet.
a friend of mine Keerti helped me a lot in this. she talked about penguin books having english translations of tagore’s works, i checked out and they do have quite a few of his works under their belt.
but you will have to check them out themselves because i have no idea about them and i certainly will not buy his works in english 
i will rather rather read bengali ones.
here is the search URL:
http://us.penguingroup.com/nf/Search/QuickSearchProc/1,,rabindranath%20tagore,00.html?id=rabindranath tagore
it worked when i last tried.
all the best!
