Gates has an online catalog of every hose it currently produces, sorted by diameter. Even though they don't list any Aero hoses I found a full set of factory correct looking molded heater & engine hoses. I spent a couple hours one sunday scanning diameters that I could cut the bends & lengths from and got every hose I needed, as originally molded.
Just a guess, but a 90 that could be cut from a longer hose might be fairly easy to find.