A Google search on this string:
'bristol site:http://www.idealhomeshowmanchester.com'
returns only a few companies with a Bristol address listed among the exhibitors. Most of them clearly aren't the one which you're seeking (because, for example, they were marketing things like conservatories). Indeed, only one possibility seems to become apparent. I can't see your metalbirds on their website (perhaps they were 'specials' for the show?) but, if this looks like the right company, it might be worth giving them a call:
http://www.tellingtales.co.uk/