Can’t remember exactly when, but within this year for sure lol.
Found this on Amazon 1 pencil ,1 dozen
I couldn't find a single pack one, but I found this... idk. You'll have spares for a while. lol
https://www.amazon.com/Pentel-Twist-Erase-Mechanical-Turquoise-QE517D2/dp/B071L7CFQJ