took all the boost pipes off, noticed there was oil in most of them, is this normal?

Also found it isnt the manifold blowing, the 90 degree bend from the turbo to the system, there are two nuts & bolts holding it together, well, only one in my case, this will explain the massive air leak, and to cap it off, the bold hasnt just fallen out, its snapped in the hole, balls.

How do i solve this, drill it & tap it? or get a new 90degree? i have heard the bolts/nuts holding the turbo onto the 90, and manifold to the turbo are prone to snapping, but i think it may be leaking from there too, is there an easy fix?

Cheers! think i have found my problem