Here are some I have for sale that I purchased from my local WalMart.
From left to right: BLS (a version of Blue Shimmer), Ice Blue, Gray, Charcoal, and Unknown.
"BLS"
Model Number: SM2AKGN
Part Number: 106-000-779
Not Pictured:
"Blue Shummer"
Model Number: SM2AKGN
Part Number: 106-000-779
Ice Blue (no name on back)
Model Number: M2AKBN
Part Number: 106-000-772
Charcoal (no name on back)
Model Number: M2AKDN
Part Number: 106-000-781
"Gray"
Model Number: SM2A09N
Part Number: 106-000-650
Silver (no name on back)
Model Number: M2A10N
Part Number: 106-000-653
A "new" color not mentioned above is the bright, shiny silver seen on the far right.
Model Number: M2A10N, Part Number: 106-000-653.
-Mike