Unfortunately I do not have extra sets of grips for my O1911 and O1918 models.
However, let me to make a suggestion, If you are looking for grips for your Colt WWI (O1911, O1918 or TierIII), my counsel is to buy the Hogue walnut 1911 reproduction grips. They are simple the best, reference number is 45673.
Hope it helps
Colt walnut grips are being made (to my knowlegde) by Altamont Co.