Is there ATC audio from the Sled Driver Speed Check story?
Sadly, there likely are no official recordings of this story.

Unfortunately, there was no LiveATC.net archive at the time, and unless there is an accident or incident, audio is not routinely archived by the FAA or NTSB.

Even when you want to request recent data, the FAA warns, "Because air traffic data is routinely destroyed or disposed of in the normal course of business, time is of the essence." (I've seen elsewhere but couldn't find an official source that it can be anywhere from 5-45 days), so even if you could find a date of this event, you wouldn't be able to file a FOI request.