Actually, I don't think there's a direct link between the laws and the number of stolen guns. I think it's all inferred. Texas, Georgia and Florida all have minimal gun control laws - no permit required, open carry, etc. and are top exporters of guns used in crimes. One kind of interesting site I've found is this one:
http://www.tracetheguns.org/#
You'll see for example that states with the most gun laws export the fewest guns to crime (e.g. New York) whereas the states with the fewest laws export the most. This is not STOLEN gun data though - most of this is probably attributed to gun show sales and sales of handguns without a permit.
I'm not anti-gun. The only reason I don't own one is because I don't have a place to store one securely, and because before I bought a nice gun, I'd buy a nice pair of Sidi's or something. And I'd never get out to the shooting range because I spend too much time on the bike.