After Bladestorm tipped me off about one of these while I was in Hong Kong, I looked out for them and found that there are two redecos of the Arms Micron (TFPrime) Optimus and Bumblebee diecast vehicles by Tomica.

Doing an online search, it looks like they came out late last year, and it is a shame to see that they are the usual "lazy" black redecos that we get from Japan with Transformers toys.

Optimus is now Nemesis Prime, while Bumblebee is now Bumblebee black version.