Same has happenned to me and I made a very simple and permanent(ish) repair out in the bush. The hole for the bolt is deeper than the bolt itself obviously which means there should be at least a few mm of good thread left down there. I simply screwed in a long stud of the same diameter with a nut on the end to clamp the oil filter cover tightly in place. That very easy repair lasted the rest of my trip (7000 miles) with no problems at all.
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