Kitfox sells a simple nicompress tool that many use to successfully do the job. Harlan had managed to score a used "pro" version of the press and was done with his. He made the comment on a video that he was thinking about selling it so I jumped on it before he changed his mind. Much easier to use than the simple one BUT more expensive. You should be able to look in the Kitfox catalog and find the press. There are any number of places that sell that one or one very close to it.
Nasty stuff is probably an understatement. Recent studies have shown that not only is zinc chromate highly toxic, it is also a carcinogen. Not worth it in my opinion. Would rather pay a bit more and not deal with the nasty.
Gary