I've just purchased some from LaBeeby, when they came 2 out of the three tunics were too small (although all the same size!). I called to sort it out and they were very helpful. They said I'll be reimbursed for the postage to send back (although I've not received this yet) and I just got an email today to say that the new ones have been dispatched.
I have also had uniforms from Florence Roby before which I really like, although they don't do longer leg in trousers (which I need!)