I believe he's misusing the term hex editor. He probably means programs in the vein of Tsearch and CE. For the record, logica, hex editors are used to edit FILES, not search for values in running programs. Also, I prefer Tiny Hexer to Hex Workshop.
As magikbullet said, undetected versions of CE are usually private (which is why they remain undetected), but I'll PM you a link to two public ones that might work.