here is a list of which Acer Models use which stylus technology
https://us.answers.acer.com/app/answers/detail/a_id/42080
The 371 uses Primax/Synaptics ( I think)
The 372 used Elan (estylus)
Here is a link that shows a couple of other units that use Elan technology.
It shows which stylus models work with the Elan system
https://issuu.com/surfaceproartist/docs/aes_pen_interop
These may well be alternates for the 372
If I were looking for an alternate pen I would look for [from a source I can return to]
The Dell Active PEN (not Stylus) , HP Active Pen, Lenovi Active Pen for Miix 700