ArDeci -> MAX7219 (x3) -> RGB 8x8 LED Matrix prob.

(piggybacking onto this thread) I found an answer to this before, but now I can't relocate.

Where does one buy a MAX7219/MAX7221? I guess I can get "samples" from

  • or buy them for $14?

Or Digikey, which I always find confusing because they have too many choices:

Suggestions?