For something Kel-tec sized, +1 onthe Galco Ankle Glove. I used one for years for a J-frame, but found the same rig for a Glock 26 too big: couldn't get the pants leg over it reliably.
DeSantis does a Renegade knock-off called the Apache, IIRC. Works good for the Glock 26, should do well for smaller, and it's fairly reasonable.
Look for good padding for the ankle. Ankle rigs are miserable without it.