I was looking around and I cant find an ISO for Snow Leopard 10.6.3

I was hoping someone can show me where to purchase a downloadable copy, or alternately just where I can get a downloadable copy.

Also is 10.6.3 the only version that my old laptop supports.
Im new to the whole hackintosh thing so I didnt know where newer or older versions would work.

Im just doing this to piddle around with and such. So I don't need a higher end OS unless its easier/better to throw on.

Thanks ahead for your help!