He did add something to the thread - there was no mention of the patch in it. Sometimes useful to add information like that to old threads, if it's relevant to the question, as these threads come up on Internet searches. Indeed, "Rock Band Queen Bowie DLC" in Google takes me straight here.
And, I'll add my own info - the patch currently isn't available, at least in the EU. It was for a short period at the end of last year, but has since vanished.