So, how would one go about acquiring some good seeds?
That's a good question - it may not be too hard if you know where to look.
Back when I was in college, there was a newspaper article about a woman (then already elderly) who had been selling poppy seeds through ads in the back of various gardening magazines for decades. She thought these poppies were lovely flowers.
Opium poppies.
She of course insisted she had no idea they were illegal - they were just
flowers, after all - and IIRC there was no evidence she was involved in the opium/heroin trade beyond selling her flower seeds. Don't know what, if anything, happened to her legally. Even back then, the news media seldom published a follow-up piece. I suspect she was just told to cease and desist.