Help--Oil Leak!!

[Hit the Brakes]

I heard nothing on this post from last week, so I thought that I should re-post!!
I own a 1998 Pontiac Transport which has started to leak oil.

It appears to be leaking just in front of the oil pan (not from the pan itself, from what I could discern). I

t seems leaking mostly while running (large drops, maybe a couple of tablespoons an hour--not a lot).

I am wondering where the oil-sending unit would be for this model?

It has been suggested that this could be the difficulty.

Thank you very much for your assistance!!
HTB