Odd, perhaps dumb parts question

I added some antifreeze to my truck the other day, and checked it today when I changed my oil and fuel filter. When I popped the lid on the radiator overflow reservoir I noticed that the cheesy plastic hinge was on the verge of completely separating. The lid still fits snugly, but once it separates it risks getting lost. Is this a part that is available for replacement, and if so, is it a dealer or automotive parts store kind of thing? And if it's not, is this why God gave us duct tape?

 

Maybe something here will work.

https://www.genosgarage.com/category/coolant-tank

 

It is available at parts stores.

 

Thanks for the quick replies. @NIsaacs, if I could just pull the yellow cap of the one in the pictures that would be exactly what I need.

EDIT: I didn't scroll down far enough, but after I posted I did see the cap sold separately. And it's cheaper than anywhere else I've found. So Geno's racks up another sale...