Technical 999cc fire engine poly v belts

[peterdance]

Can anyone please give me the part number or belt number for the two poly v belts for the 999cc fire engine. One goes horizontally from crankshaft across to the aircon compressor, and then the second one runs vertically off the aircon pulley up to the alternator pulley. I know the numbers start with 4PK and then 770 if it is 770mm long ie 4PK 770. And I think that is the correct size for the aircon one but I am not sure and i do not have any idea of size of alternator one