Build up at Hyperscale, including some pix of the scratchbuilt bar armor process. There is also a link to the manufacturer's website.
http://www.hyperscale.com/2008/galleries/program535rb_1.htm
You could probably ping the builder off of Hyperscale for more info.
The thing must be the size of a shoe box, there may be 4-5 pounds of resin in the kit.
Resin costs ~25 bucks per pound (in pound quantities, less in bulk). You would probably need a similar quantity of RTV to make the molds (at similar costs). The master & manufacturer arn't making a great deal of profit - probably more a labor of love.
If its a subject which interests you, and you are aware that it is not a shake-n-bake kit but will require some scratchbuilding, I'd say go with it. It is not a piece of overpriced styrene which we're seeing now