I am in the process of installing an AEG HC5690M cooker hood and I need a duct that is 150mm wide and approx 50cm long and also a reduction flange from 150mm to 125mm. Does anyone know where to get these 2 items as I can't seem to find them anywhere and am desperate to finish the (nearly) final piece of my 4 month long kitchen makeover. Cheers in advance.