Look at this.
http://blueprintengines.com/index.php/products/bp-blocks-landing/item/bpt4600100s
Brand new made in USA block for a tick over 2K. Why can't they cast a big or small Mopar? They also have new Ford and Chevy heads available, but again, no Mopar. So what's the excuse there? "Oh we wouldn't sell enough?" Not offering them at all is one quick way to sell none.