There are MANY makers offering holsters for the Colt Defender.
Please be a little more specific as to what you're looking for. OWB, IWB, etc.,. Price range?
In general, any holster shown as available for a 3" 1911 should work for the Defender.
I'm using a Milt Sparks VM II for mine.
I was looking for an OWB, something like an avenger. The ones I've seen listed an officers model as well as the Defender. I'm not wanting the extra half inch of leather. Looking to be in the $50-70 price range.