Cooker Extractor Unit

[kevinb]

We had  an extractor fitted above our cooker/hob when we first bought our place on GA, I'm looking to replace it due to the hellish racket it makes, I can't fit a conventional hood as the ducting is off set to one side, the existing unit is fixed to the wall and flexible ducting goes into the built in stack. I can't seem to source a replacement for my situation,  and ideas gratefully received,  thanks.