Should be one of these really :
http://www.scoobyparts.com/acatalog/...OSE_-_RED.html as It should bend and I think the diameters each end are slightly different.
Plenty of various 90mm options on ebay, buy an elbow and cut off what you need :
http://www.ebay.co.uk/sch/Vehicle-Pa...icon+hose+90mm