You're right, a rattle can of paint will save people a ton of money...lolOEM used to mean that, correct. However, its a brand now.
Yes, Ford Racing sells them. They are Ford or Motorcraft. Same as available from any Ford dealer or Ford/Motorcraft parts vendor.
If you want wild colors, go buy some spray paint and paint them. If you want COPs that work, go buy Ford or motorcraft COPs.