I have a set of Hipshot Grip Lock Locking tuners with the knurled buttons for 3x3 that I took off a guitar. These are great tuners, they were just the wrong tuners for that guitar, so I replaced them with ones that fit. These would be a great upgrade to your guitar if they mount up properly.
I'm only asking $60 for them. That is less than half of what they sell for everywhere else.