vibration damper thoughts

[SquareOne]

Just to continue this thread....I"ll be replacing my damper when I shut down at the end of the year (engine just reached the 500k mark). For those who have done this, is there a particular site you would recommend for an OEM part?

My part number as per Q/S is 4101884.

The couple sites I've found with the Cummins damper are approx $715-$750. Would that be about what you all had found cost wise? (Cant ask my local shops as they are through the roof on every damn thing....absolutely ridiculous the mark-up on their parts!)