There are some good Comet pics on the Air Britain site. This one, by an ex-ATC colleague of mine, freaked me out... Looks much better in original BOAC colours:
De Havilland DH.106 Comet 4, G-APDB, BOAC Cunard
Here's one of a Mexicana Comet:
De Havilland DH.106 Comet 4C, XA-NAR, Mexicana (MX / MXA)