As Randy said, don't pay 100 for a pump.

The oil is coming from either the valve cover gasket...is tends to weep first at the hump in front. Or the cam seal (behind the timing belt cam gear ) is another source.

When doing the water pump - the solid heater return line than runs along the engine under the exhaust manifold has a bolt that holds its bracket to to the block - down between #3 and 4 exh. Take out the bolt and free the pipe- this helps you get it seated and sealed on the new pump. After you've got the pump on then re attach the bracket bolt.

Leaks from this pipe where it goes into the pump are then avoided. Also make sure you clean the end of the pipe well before putting on the new rubber seal. spray some silicone into the pump here so that the seal slips in all the way and dosen't pinch or roll.