LEGO is a wonderful source of everything.
As for my toys: Four images of Jada Toys' Nano Metalfigs. Diecast solid metal figs from multiple lines: GI Joe, TMNT, DC, Marvel (pictured), Minecraft, Harry Potter, Walking Dead, WWE, Nightmare Before Christmas, Transformers, and possibly others I don't recall. About 5 CM high & wide, slightly too large to use as minis. But it doesn't stop me from trying, and there's a aftermarket of cusomized figs.
And in the US, they retail for about $1 a fig, though they're sold in 18 or 20 packs now.