OK my stock balancer is f***ed. It has a chunk about 2 inches long and almost 1/2" deep missing out of it.
Just had the crank seal swapped under warranty and I think the jackass dropped it from the looks of it. There is no way a piece just falls off and its too high to hit something.

So, what are my options as far as replacement? What brands and where can I get them?

 

Stock. Or, JEG's sells a Pioneer for the LT1 - both standard and U/D. ATI and Fluidampr have SFI-rated models, but you are looking at close to $400 with those two. ASP sells U/D damper/pulleys.