Done a quick search and not found a definitive answer, is it just a case of replacing the belt with one from a non aircon model, found some possibles that are the right length but don't have the grooves on both sides, will it matter?

what do you think?

Length seems ok, just the replacement belts are not grooved both sides as the original belt is,

one side belt is for non-aircon

CS pulley,steering pump ,alternator are drived inside the belt,the AC compressor is driven on the outside "face of the belt"