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Cervelo R3 headset

Need to replace the headset bearings on my 2018 Cervelo R3. I can just about read the print on the side of each of the bearing, which is as follows.

TH MR019 1.5 36x45 H7
TH MR040 1/8 36x45 H7

Anyone know where I can find these? Can't seem to find anything that matches.


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