The caliper weight I cannot give you, unfortunetly given the rush to make CougarFest we were un able to weight the calipers, what I can say is that these are night and day difference between the stock caliper.
The rotor is an SVT Focus Rotor as mentioned on page 1 of this thread. So to answer your question, yes it is readily availible Via the web or your local auto poarts stoers, replacements should not be an issue.
The caliper is a .81 caliper body, Forged Billet Superlight.
