Cable for fuel cap retention?

Somehow I doubt my cap would dangle and bang around anymore than the cap on my Town and country, and the chance of me not seeing it hanging there when hoping in to drive is equally remote, but I have left a cap on a petrol pump (there when I got back) and on the roof slid off and damaged on the ground, which only twice in nearly 40 years of driving but still these body colored caps are getting hard to find, unless I buy a repro. For the sake of a couple of screws, thought I could use a hood pin lanyard but don't have any spare at the moment, so wondered if there was another option?