What colour is the plastic? I just changed my tensioner pads and the old ones looked like this at about 90K miles:
You can see the plastic comes of in little chips so that could explain your "flecks". My deviations were a bit higher than yours.
From what I have read on oil filter analysis you should expect to have some metal, engines shed metal as someone said somewhere. I just installed a magnetic drain plug and have not looked at it since so don't know if it can be expected to have the ferrous particles that you describe. Has it changed since the previous oil change?
I tend to be an IMSB sceptic based on examining 3 bearings in engines from 90K to 120K miles. On two I pulled the bearing seal, verified that the bearing turned smoothly and had no play and left it like that. Both these bearings had no grease in them but some reasonably clean oil drained out. The IMSB in the third engine, that I am presently working on, seems to turn smoothly and not have play but there was no oil in it. Most worrying was that there was what looks like dried grease on the seal and in the bearing. See post #5 of this thread.
Going through my original engine
I still haven't decided what to do with the bearing, but looking at the pictures again is pushing me towards changing it.
Good luck with your engine.