Bush are a part of the Alba (my first hi-fi! Great little machine.) group. I have looked on their site. Look here- http://www.albaplc.com/html/Support_popups/bus h_pu.htm#
It has contacts including email, with an online instruction section coming soon. Sorry I can't help further.
There is also some help here-- http://www.instruction-manuals.co.uk/category/ tv/bush.htm
Not much, I'm afraid but I am trying to help! I had similar trouble with my once-new widescreen Grundig TV. You'd think they would be a little more accomodating, wouldn't you?
Me again! There seems to be what you want here- http://www.donberg.ie/descript/b/buw67use.htm
Unfortunateley, it costs 14.90 euro's (about �10.50). Worth keeping in mind as a last resort. And check it is in English!