Tecnifibre Tub of Over grips for Tennis or Squash
Over grips for Tennis or Squash they come in tubs of 48, with Blue, Red, White and Black as the colours.
Or buy a few individual ones you choose.
Buy yourself a tub and pop them in your bag for when you need them or sell one to the guy who always borrows one but never replaces the one he borrowed; you know of who we speak.