Wombat skid steer (bobcat)

Hi , Garrie here, I have a Wombat 50hp bob-cat, they are imported from that pklace that copys motors amongst other things. my problem is the motor in mine has gone to god and i dont want to buy another china motor, the importers said the motor was a copy of a nissan forklift motor but couldnt or wont tell me which model they are copied from. Please anyone out there with one of these i would appreciate your input, Gazzman.:

Wombat skid steer (bobcat)