50 yrs wrenching, I'm still dealing with this. I currently have every AN fitting there is - EXCEPT the one I need today, and $1ks of hardware inventory. At least once a week, I'm asking around the airport for the one thingie I need, or having somebody come by asking for their absent thingie...
Long way of saying: make up a list of what you use, go to Wicks or Spruce and splurge on yourself.
And make friends....
A&P; RLSA - A,G,W/S Falco F-8L
50 yrs of flight and counting
Dues paid 2017 thru 2020