XT XTR SLX Brake levers Spares kit Brake Handle Oil Seal Diaphragm Components Oil Leak Repair Parts Brake Handle Oil Bag for Shimano Brake levers

Online options not shipping from china are sparse but these are on Amazon with reasonable shipping. I just did the same repair this month. https://www.amazon.com/dp/B0B9K8W2MN/?coliid=IUYDZSOD2F76A&colid=1ZTRU4R5L4Q66&psc=1