Fuel cap strap snapped

[evdok]

My fuel cap strap has snapped, is there a replacement or do you buy the whole cap?

 

[MWCLS]

Probably the whole cap, there are some used cap and strap on ebay for £20 odd... No idea what MB would want.

Saying that I just purchased a new oil cap as rubber seals break down overtime, main dealer £7.00 I was surprised lol