Bhante translated the four main nikāyas in his mega translation project. The Udāna is in the Khuddaka (fifth) nikaya.
For fullness of answer though, I should mention that, he has actually translated some bits of the KN: he edited Laurence Mill’s translation of the Sutta Nipāta and he is credited as the translator of some of those texts. He has also translated the Theragāthā with Jessica Walton. I could well imagine there are some other bits of text from the KN he’s translated that I’m unaware of, but I don’t believe anything from the Udāna will be among them.