Kevin,I think you should take a breath here for a minuit.
Some close up shots of idlers and rollers and the bushings are important .
From the pics,it’s easy to write your D8 tracks off,but just hold on.
Those pads are wore out,so are your segments.BUT,your link height is good and I very strongly suspect that a set of non Cat segments will make those chains run on and on for a good while yet.
You must change your segments immediately though as they are chopping into the bush.Once the bush holes out,you’re on a slippery slope.
Turning bushes,is not cost effective in my opinion,but ITR segments cost £450 UK pounds for both sides and are fitted in 2 hours.
Make sure you clean all the mating surface’s Luke your eating your dinner off them and torque and turn the bolts tight to the correct spec.
As for pads,do you really need them at this very moment in time?What work does this D8 do?? You may use it for a few jobs every year and the segments will get you another 6/700 working hours.
Please take more pics of those bushes and don’t rush into buying anything today.