Ortex data for $AMC, $ATER, $BBIG, and $GME.
Shares available to borrow according to Fintel:
#AMC
= 1.4M (0 borrowed since closing)
#ATER
= 65K (30K borrowed since closing)
#BBIG
= 400K (0 borrowed since closing)
#GME
= 250K (50K borrowed)
Data for your DD.