I want to replace my awful looking exhaust hanger with an aftermarket alloy one. It doesn't have to have provision for the foot pegs, as I won't be refitting them. I have scanned the internet but I'm unable to find anyone who sells one for this application. Does anyone know where I can purchase one from?

make one

Take the standard one to a machinist and ask them to make one!
Antig engineering in gloucester is near to me, i can pretty much take anything in (rear sets, exhaust hangers etc) and they can make one exactly the same from ally.
Don't think they've got a website, but google it and the number is on there.

I have one made up if you want a template to work from?