I did this conversion and found it well worth the trouble...
The caliper is Honda P/N 45250-MGS-D81 and the pads are P/N 06455-MGS-D81. FA388HH appears to be the right EBC number for the ABS brakes.
EDITED TO ADD: Notice that after 2013, the ABS and non-ABS bikes both had 2-piston calipers. The caliper is very expensive as a new part. If you can find a dismantler (like an eBay seller) parting out an early ABS bike, you might do better. Some can question whether it is worth the money, however I know the braking to be stronger and you can read of a near-accident I just had where I barely stopped in time. So, who knows, it might have saved totaling me or the bike or both. I don't know how it would have come out with stock braking.
Interesting that with the fitment of 2-piston calipers to the 2014+ ABS models, this mod would now improve braking on them as well.