I loved my S1 and am having no luck replacing it as everything else seems so boring but what you are facing was the main reason I sold it as I could not get simple parts like window motors, aircon condensers etc not to mention the buggy’s like fuse boxes and controllers which gave me visions of owning either the worlds biggest paperweight or the worlds biggest moneypit!

Would it be worth checking out some of the custom exhaust makers to see if the have something suitable or could make a custom one, which will probably be expensive as they have no economy of scale with Aeros.