The filler cap is interesting, as the 16i covers had a screw cap filler cap, rather than puch on like the normal CVH covers. It wasn't a threaded screw cap tho, it was one of them ones you half turn and it locks into place.

When I got my 16i cover, the cap was missing, and Ford said you can't get em anymore. I tried a metal cap from a Nova 1.2 SOHC engine and it fitted perfectly. Quick polish up and it looked spot on aswell

Then a year later I found a Ford one at an Autojumble for a tenner