I actually just got off the phone w/ HP Performance and they ARE making blocks. They got restarted recently after being down for a couple years after their initial launch...that was the last I'd heard and didn't know they were up and running again.
The blocks are aluminum, hemi or wedge, tall deck or low deck. None in stock b/c they go out as fast as he gets them in. Should have more available to ship in about 3 weeks and hopefully by mid year he'll have a bunch in stock ready to ship...that's the goal.
VERY nice guy to talk to and from everything I've heard about their blocks, I would not hesitate to use one.
HP Performance 865-310-7513

Sure seems like a good thing w/ KB being tough to deal with lately and Indy being, well, Indy.