I don't think you can get a true Shadow in the USA. The Shadow offered by CZ-USA is actually a custom shop gun that has the existing FPB removed. You might go to the "Ask Angus" forum and ask there to be sure.
The CZ-85 COMBAT is the only CZ-75/85 variant that I know of that does not have a firing pin block. I wish CZ would offer the Stainless 75B and SP-01 without it as well.