Go here:
http://www.earlstewartscion.com/New-Inventory.aspx
Do a new Scion Inventory search and click on the FR-S. You should be able to see colors available for both AT and MT
From what I can see:
86 ATs (Lol, 86?)
31 Whiteout
19 Asphalt
15 Firestorm
14 Raven
7 Argento
40 MTs
15 Whiteout
10 Raven
7 Argento
6 Firestorm
2 Asphalt