If the body of the carb is cracked, it can't be repaired. The resin they are made from doesn't accept any kind of adhesive or epoxy filler and there are only a few parts on them that are available new and 'can' be replaced. You will need to hunt down another carb from a JY - the carb itself is designated as a Mikuni 32-35DIDTA but there are a number of different variants depending on year and emissions requirements. These carbs are found on Mitsubishi vans as well but it will need to be from another 2.0 as the jetting from a 2.6 will cause it to run rich. If you haven't pulled apart a carb before, the Mikuni is either your worst nightmare or a perfect baptism of fire. Be aware that, if a carb you choose to use hasn't been apart for 15 years+, it will be due for an overhaul anyway as the diaphragms and seals are past their serviceable life.