Many brands sell makeup in single format. Most of them are already housed in metal pans, which will automatically stick to the KLIK palette. For those that are housed in a non-magnetic one, a quick stickie will make them KLIK!
Here are a number of brands that sell makeup in single format:
MAC, NYX, NARS, Shu Uemura, Make Up For Ever, ColorPop, Anastasia, Makeup Geek