Kudos to HMRC for fixing this - they now randomise the results to ensure they can't be gamed with nonsense punctuation. And, entirely coincidentally, Coconut Free have decided their name actually doesn't start with a random exclamation mark.
Instead you have to pick from myriad commercial options via their search service, which providers are gaming by giving their products nonsense names like !Coconut, "untied" (quotes included) and #GoFile to get to the top of the alphabetical results