A lot of folks are up in arms about the lack of gnomes as PC races in recent games. Perhaps this explains their absence:
Swords & Wizardry monster stats below…
Alien Gnome Bandits
Armor Class: 6 
Hit Dice: 1+1
Attacks: weapon (1d6-1)
Special: grab gnome attack
Alien gnome bandits are bizarre creatures from an alternate plane of existence. They travel to our dimension in order to kidnap gnomes for unknown (but clearly unsavory) purposes. Alien gnome bandits have a +1 to hit vs. gnomes and on a roll of “20” have successfully grabbed the gnome, allowing further attacks by alien gnome bandits to hit at an additional +1. This bonus is cumulative (i.e., if two alien gnome bandits successfully grab a gnome, further attacks are at +2). If two or more alien gnome bandits grab an unarmed gnome and hang on to him for three consecutive rounds, they wink out of our plane with their victim, never to be seen again.
Garden-variety Alien Gnome Grabber figures available at the Wireless Catalog.