it came up that Dupli-Color doesn't produce 5oz spray cans with color 1C4 at all (only Scratch Fix pens)...
After confirming this with manufacturer (true) and looking with no luck for other brands making matching color 1C4 I started looking for e-stores. Hit!
I found 2 stores selling spray cans (12oz) with 1C4 matching color (requires Clear Top coat spray as well):
http://www.automotivetouchup.com/cho...C4%2C+No%2C+No
(cheaper)
http://www.paintscratch.com/
(more expensive)
So, if anyone like me was looking for an aerosol spray paint (color 1C4) to quickly fix the painting on your bumper then consider internet order asap as you will not find those spray cans in any of local chain stores selling automotive accessories (e.g. Advance Auto Parts, Auto Zone, Pep-Boys, O'Reillys, etc.)