You could just get some fairly standard bolts with the captive plastic cover, they look good once fitted. Fairly sure I have some knocking around.
Or you could get some metal screw in covers. I've got a set of these I had for sake but can do cheaper then listed as I was guessing at a price and no takers.
Or you could get blingy with x lite or similar ones. Might have something along these lines as well.