Now I am confused, PBR have told me they don't accept Western Union payments.

I had the same reply “No Western Union” when I made my first/new order a year ago.
Maybe he is relaxed about older customers using Western Union?
I just used 7-Eleven Moneygram (around AU$20) and put myself in credit for future orders.
I think he likes Moneygram, as he just has to duck into a US 7-Eleven personally and gets his cash instantly!
Could be wrong with that theory though.