Magnitude smagnitude Uranium metal is easy to get, but thorium metal... That's a few smagnitudes harder Thorium salt is about all you'll ever find, if that... I came across Thorium Nitrate some time ago- Stocked up!! I make pretty crystals Your best source for the metal would be thorium mantles, or salvaging old CRT tubes for thorium-plated cathodes.
I'm afraid of uranium and thorium salts as they are very toxic. Is there an easy way to reduce them to the metals. Though now that I think about it, the resulting metals will be powdered and thus pyrophoric...