@omemijk
BX2 Means it a linear (not log A taper) with 2 segments to be stereo.
I would just get a 100kohm A taper (log taper) Alps Blue Velvet, should do the trick will be in a little different (lower) in position for the same volume that’s all.
https://www.ebay.com.au/itm/GENUINE-ALPS-RK27-Potentiometer-100K-pot-blue-velvet-Japan-RK27112/35140...
Cheers George