That's something new. Most probably just point it to 'em that you want the cover for the metal mount.
It is called 热靴盖, not sure if I type correctly a not. The funny part I ask for 热狗带 at another shop, my friends burst into laughter. It shows that my mandarin is really that bad! The shop assistant went blur straight away, HAHAHAHA
I am stuck in an expensive hobby, but yet not willing to save myself