Skorpion oil tank leak

Hi Folks,
First time out on my rebuilt Skorp and noticed oil on the rear mudguard. Traced in to a crack at the base of the filler neck. Obviously I can't ride in this condition. Anyway of repairing or am I looking at a new tank?
First time out on my rebuilt Skorp and noticed oil on the rear mudguard. Traced in to a crack at the base of the filler neck. Obviously I can't ride in this condition. Anyway of repairing or am I looking at a new tank?