riderosa

I recently bought a 2004 350Z (my first one) and put it up on my MaxJax to remove the transmission and change out the clutch and flywheel. I noticed that there is a lot of oil on the engine and clutch area and I plan to remove the upper oil pan to replace the front and rear main seals. I have a couple of questions:

1. Where can I get a new upper oil pan? Seems like everyone is out. Mine might be fine but didn't want to take a chance.
2. I have seen videos on removing the Upper oil pan but can I replace the front seal and the pan gasket with the car still on the car.