One such is Matchboxkits.org. I have fond memories of discovering Matchbox kits - in the far off 1970s they made for an interesting contrast with the staple Airfix offerings. Oddly enough Bertrand and I were reminiscing only a couple of weeks ago about some of the kits we had built.
Anyway, back to the website. Here you will find loads of information about this surprisingly large and diverse range of kits. All images are copyright Matchboxkits.org.
To whet your appetite, here are a few carefully chosen images together with my own awards.
Winner - Worst use of two colour plastic. The Gnat was the first Matchbox kit I built. It may have been a nicer kit than it's Airfix competitor (I wouldn't know) but here the two-colour plastic rather let it down. Red and Orange Arrows anyone?