Sorry to hear of your engine woes.
It sounds like bottom end to me, however, difficult to be informed from where I am sitting.
I would firstly get a stethoscope on it, to trace the area of the noise.
Another thing to check is that the main timing chain tensioner is not broken as these are weak and prone to breaking, however this would give you a heavy ticking noise as would a lobe off one of the cam shafts, so the noise is pointing to bottom end, crank, con rod area.
If that turns out to be the case and you require a known, preowned, low mileage, Rev Up engine, then just give me a shout as I am removing one from a car this week.
Alex.