While of course there is RAFM.com, many other manufacturers have figs great for investigators, the unknowing populace and the things that are not wholly of this reality.
Em-4 Minis
Thugz are perfect for modern encounters or a game of Grand Theft Cthulhu
http://www.em4miniatures.com/acatalog/Thugz.html[/img]
Old grenadier Investigators, painted, for when you are too scared to paint.
http://www.em4miniatures.com/acatalog/Copy...Detectives.html
Old glory has some very nice period pieces, and…
http://www.oldgloryminiatures.com/detail.a...oduct_id=CIC-07 these two figs scream CoC.
Games workshop chaos army of Tzeentch has horrors, flamers, and faceless gliding things that will rip away sanity as fast as they rip holes in your wallet. Their Tyranid line has all sorts of figs just begging to be pressed into service as a servitor race with giger-esque feel.
http://store.us.games-workshop.com/storefr...=3&database=896
Heroclix has tons of civilian figs just waiting to be pressed into service for modern, pulp and noir era games. The skimpiness of the female heroine’s outfits often makes them perfect for streetwalkers and such in modern games. Several of the mutants are also inhuman enough to be decent critters. And for real fun, set a Cthulhu Now! adventure in a comic book convention center.
http://img117.exs.cx/my.php?loc=img117&image=hero4.jpg
The Mageknight game has a handful of figs as well that would be easily used a servitor races for CoC
Of course Horrorclix has a few Cthulhu flavored figs