OP - LET will replace the failed pulley and the damaged crank pulley (when we spoke you didn't mention the crank pulley was damaged).

I'm still not 100% sure that the bearing was at fault due to over spinning.

Over torqued idlers have been seizing for many, many years.

I have personally put 30,000 miles on my C32 with the same bearing that you had fail with no issues at all. Others have done the same...

Now, take a simple Google search for "Seized idler pulley" and you get tons (7,090) of listings where idlers have seized.

Google Search

There is even MBWorld listings for C32's without our product installed that have had a seized idler.

Link to listing on MBWorld

I understand your frustration and I did everything I could to help get the car on the road. I have taken proper measures and offered to replace the LET parts on the car.