british war and victory medal

Hi,I am trying too get hold of my great grandfathers medals ,He died in 1917 and apparently they were only issued once so i cannot re apply for them again through the MOD ,I knw it might be a needle in a haystack but you never knoe ,His name was Walter Ernest Cramp I have his Memorial plaque .......Many Thanx Paul PS he served in the 14th Battallion Worcestershire Regiment........................ Cheers