Chromebook stylus...which one?

[Countcussy]

So, as a reward for my daughter doing really well in transitioning from junior to high school, I splashed out on the Acer spin 714 chromebook, as it ticked a lot of boxes, and her homework is via google classroom.
Fast forward a month, and she has lost the stylus that docked within the device, and has got herself pretty upset, as she loves to draw and sketch on the device.
I have zero knowledge on these pens/stylus.
Quite happy to replace it with something that does not dock, but it seems a minefield, and the prices vary so wildly? Can anyone suggest a replacement?

 

[lsg1r]

Looks like it's usi 2 comptiable

I've got a lenovo chromebook and a fire max 11 that both support usi 2 pens. Bought a matching lenovo and amazon one for each ... honestly the amazon is a much better quality pen and it's only £35 - it 'should' work being tsi 2. If I'm being honest I'd even go as far to say I prefer the amazon pen (it needs a battery) over the surface slim stylus.