2008 VE L98 Chirping

[monstar]

I believe the cam bearings can also chirp in the LS when they fail.

I would put it down to Lifters, cam, cam bearing, I wouldn't be driving it any more until you know for sure.

If one of the lifters does let go completely you will throw metal through the engine.

Yes but lifter roller damage caught early can be minimised with the use of high zinc (ZDDP), at least abate wear long enough to organise lifter / cam replacement.
From first serious chirps to grinding was six months, 45k km using Penrice 10 Tenths.
Yes also cam bearings should be replaced at same time, particularly those with AFM.
There is a TSB about it but a new type of bearing has been created for the five journals, basically Teflon coated with less clearance.
Cheap as, but replacing cam bearings is a bugger, is why at 170k km intervals I lift the engine and rear it down. Ends up much cheaper, more comprehensive and greater engineering flexibility.