I bought a neck holster from Stellar Rigs for my Kel-Tec P3AT. I replaced the 36" chain that came with the unit with a more comfortable nylon cord. I bought this so that I could have a carry method while I was lounging around the house in my T-shirt and gym shorts. I have to say that this is very comfortable to wear. I also wore it over my T-shirt and under a button down shirt when I'm out and about. Presentation is not great, but it is better than having an ankle holster and I will get better with practice. I hear some guys have a button sewed on the outside of their shirt with velcro holding it shut so they can reach in and grab their CCW quicker.
Check out this link to see a picture. They also offer neck holsters for North American Arms mini revolvers. Bonus - my Ruger LCP fits this rig also.