There has been a discussion lately here, about these things, 80% frames. These can be sold without an FFL transfer and even without serial numbers. They are suppposed to be used by the buyer to make his own pistol. There are some strict legal requirements about what consists an "80% frame" as well as how you are supposed to make your pistol from one.
If I remember correctly, the last place we knew selling those items was long gone from the internet, but today, I spotted another shop which has these.
Please note that M1911.ORG has no relation to this shop, and of course, has no responsibility if you decide to buy one of these frames, what's so ever.
Here is the site: aresarmor.com
And here is the page which describes the frames: http://aresarmor.com/store/Item/rudius1911