The oil cap is available from a few places. I first seen those on the Mustangs and had to have one.
I do not have two ports on the turbo outlet piece. One is a port for the map sensor. The other is just a nut welded on. I did that so if down the road I had issues with those boots wanting to slip off I could easily make a link to hold them together. So far there has never been an issue so there is just an allen head bolt in there to dress it up.