[RadioAstronomer]

FYI, You can buy all kinds of radioactive sources thru the mail.

I bought a Cs₁₃₇, Co₆₀, and a Sr₉₀ test kit this way.

[Wonder Warthog]

"FYI, You can buy all kinds of radioactive sources thru the mail."

Yeah, but I'll bet they would look at you a bit askance if you asked'em to ship a thousand or so to the same address.

But, 'tis true--anyone can buy any isotope in "General License Quantities".