XDA is always a good starting point for a search:
https://xdaforums.com/t/oneplus-6-rom-ota-oxygen-os-mirrors-for-official-oxygen-os-roms-and-ota-updates.3792244/
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XDA is always a good starting point for a search:
https://xdaforums.com/t/oneplus-6-rom-ota-oxygen-os-mirrors-for-official-oxygen-os-roms-and-ota-updates.3792244/