Yes, the red paint is the softest, for sure. However, it really may be worth persuing the dealer route if it is looking really peppered. Alfa have admitted that a specific run of red cars do actually have substandard paint, and some cars have had partial resprays under warranty. I think it's something about the original factory paintwork not getting the correct baking time (too long or too short, can't remember), rendering it even more likely to chip.
I was unfortunate enough to hit a deer down a country lane in the dark when the bloody thing darted through a gap in the hedge just when I was bowling along. As a result the front end of my car has been repainted by an indy. Don't want to speak too soon and jinx myself, but up to now this new paint has held up much better, with only about half the number of chips of the original red paint.
but no, I don't know where you can get them big bras, sorry.