Yes these are still for sale. And to clarify, the header are not cracked. What you see in the photo is a combination of bad lighting, protective coating, and minor imperfections on the headers. I've attached more photos to show that section of the header.
These headers will fit the block of an B-series engine, but they will NOT bolt directly to stock catalytic converter for any of the models. The header flange is too large for the stock catalytic converter flange. This has a 2.5" flange, and the stock catalytic converter can maybe accept a 2.25 to a 2.36 (60mm).