Dealer says timing cover is leaking oil, what should I do?

[tmontague]

^this. I would triple fold an old towel and place on the jackstand so you don't scratch the pinch welds and eventually cause rust

The other place I have placed stands are under one of the control are or subframe bolts up front. Those are all solid and strong places to hold the weight of the car. You can also jack from here so you don't fold in the pinch welds