rearend ? again

well the seals that napa ordered or wrong the guy tried measureing my old seal and couldn' t come up with nothing the seal has a number rf200 on it which oreallys came up with a# 472397 on which napa ordered there listing says its for a timingcover but that # at rockauto says axle seal should i order it and try it ? can't belive the trouble i'm having finding a seal