any hardware store will sell you a hex set for 2 - 3 bucks. You may need metric. Why not consider the Rega cartridge line. I'm quite happy with my Exact 2.
Rega P-25 cart recommendations -mm or mc pref.mm
Now a new(er) question: I think I would be happier staying with a MM cart since I only just got the Bellari phono preamp. Could y'all chime in with a recommended MM cart or do you feel very strongly on the Denon or Dyna MC carts? If an MC cart would make that much difference, would I be okay in going back and just plugging the Rega directly into my Sansui (restored 9001) phono jacks (would spare me buying a new phono preamp in the near term)? Also, plan to do the Baerwald setup soon - thanks for the info that led me to the template, Viridian! VEry cool and I just started watching Fremer's setup dvd I bought at Christmas and he even mentions the Baerwald setup - as I held the template in my hand! Finally, is there a place to buy the hex driver that fits the cart. alignment needs for a Rega - is it a widely available thing? My bike hex things are too big. Thanks in advance for any and all help.