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https://www.amazon.ca/gp/product/B07FR7KFNG/ref=ox_sc_act_title_1?smid=A30WUG2ZDGM0XM&th=1
After receiving the o-rings from amazon, it appears that these are a little smaller than the factory installed ones. They do however appear to work well with no issues so far. The factory ones appear to be slightly thicker ~ 3.0mm. With hat said you may want to try an o-ring: 18mm OD 12mm ID, 3.0mm Width.