I had the same problem. First I changed the oil pan gasket, then,I changed my turbo to a T78, Still oil leak.
It looked like it was coming fro the oil pan blowing everywere. Still leaking. Ok I was on a mission. I got a new oil pan and another gasket and two tubes of rvt.
I was making sure no more leak. Well it still leaked. I was pissed. So I cleaned everything of, it would only leak under boost, I saw something coming of the little oil injector/oil pump/oil sending unit. I looked in the bood well there was a little O ring, This is were it was coming from. I started it up after I cleaned everything off, and then took it out. It is still leaking but it looks to be coming from the oil sending unit.

Hey at least I don't have to worry about any rust on my FD

 

Check all your PCV valve. It may be leaking under boost, and pressurising your oil pan.

 

its not coming from the oil pan leak starts to high what whee are the pcv that your talking about .

 

ok i found it . i putdie in it and it was coming from the front cover behind the water pump