Have you tried large plastic jerkbaits? 10" Fin-S fish (no weight) by Lunker City will work well. Colors really depend on the area. Perch and Alewife work well in my area.
I had a Musky that was just as elusive.I felt like Captain Ahab going after Moby Dick!If this is a river Musky, here is a suggestion.Get the largest stone cat you can get( or a 7-8" live trout).Hook him on a 2/0 circle hook on a steel leader.Cast it out and watch for the wake from the Musky.Let the Musky set the hook.This technique helped me get a 20 lber.Put her back so you can catch her when she's even bigger.It works!
If you're using cranks, you might try deadening any rattles in them, too.
Well??? I'm waiting for a report.
Nice fish...But what lure worked that day, conditions, lake/river, etc.....Details buddy..details.