That should be all that is needed, if you are buying the grips used most folks throw in the locator pin as most are going the other way -- from factory / OEM grips to the Monogrip hence no need for the locator pin.
Also the locator pin is only a big round dowel of alunimum. Anyone, I mean anyone could make one if you have a basic metal shop. Heck it might even be a stock size of round, I just had a GP apart, will have to measure next time. If you wanted to go really fancy you could make it out of stainless to even out the way the gun balances.
