Down a few threads https://budgetlightforum.com/t/-/22440
They’ll cost more since they’re sold individually. Maybe email him or see if you can get a bulk discount. I’m pretty sure they’re all legit.
Unprotected or protected? Sanyo? Those are about 2400mah.
I’ve had good results ripping up laptop packs/tool packs (Not the pack based Lipos!) for 18650’s but that depends on your skill set/risk level.
I haven’t used any newer packs either, some of the newer ones don’t used 18650’s anymore (Smaller cells) :(.