Dude, 2 seconds on google and I have a chrome shop right in your back yard.
Kentucky Chrome Works
High Tech Chrome Plating
FYI, since metals like copper and nickle have been going up expect the price to be pretty far up there from about 6 years ago. Not to metion if the block needs to have an acid bath you are going to need a machine shop to go over the block once you are done with the plating. Last thing you want is obstructions in your cooling and oil passage ways. Sure you already know that, just putting it out there.