With the sixth Transformers movie now out, Metal Earth have produced two model kits for the fifth movie - both are Optimus Prime, with one being in robot mode and one being in truck mode.
They are slightly bigger than the first Gen1 Transformers model kits they produced (these are about 5 inches at their largest dimension, compared to the Gen1 ones being about 3.5 inches)... and these ones are coloured, unlike those first ones being plain steel/silver or gold.
(the second series of models they produced, which look like Authentics designs, were even smaller than the first ones, but were coloured like these new ones)
Prices look to be about US$25-30 (compared to about US$10-15 for the first series).