@Birdie made one a long while ago and @buzzer made one recently when he saw a picture of Birdie’s. Fellas there’s a market there, I’d buy one.
I quite like that. Especially as it would be hidden. Might have a crack with an old bit of cooker back stainless I have. Just the right size. If I do I will pic up, innit.
Granted, not in the UK or EU, rather USA... I have these on my bikes, both case protectors and rad guards - bot are excellent quality and fit. http://www.coxracingroup.com/113-15201-Ducati-Chain-Case-Guard