where are you? here in NY the back-up isn't kel-tec, its the company that tests a round through the gun to include with the new sale (not all manufactures do this and it is law in NY and..Maryland?)
So here, that is the back up.. and they are POPULAR right now.
If you are elsewhere... i don't know. Have you asked the LGS if they can get one, why they have none?