Gearbox without oil spray

Hi, I have a new to me Rotax 912is with 180 hours with a good amount of vibration. Haven’t done the dynamic prop balancing as of yet (just received the plane) but planning on it. My question is, with gearbox serial number 58665, I clearly have the bad one without the oil spray setup. Can one just adapt my gearbox with the newer parts or I am looking at the entire new gearbox, which is $7800??? Looking for direction please.