I got my 372T today and it was a SKU that came with the stylus. Nice! I had also ordered the Lenovo miix 700 Active Pen as I found one for under $20.
I can confirm this Lenovo pen does Notwork with the R7-372t system. Not even detected so even though both systems are from ELAN they are totally different. UGGG What mess the stylus systems are.
That pretty much says my guess that the newer Dell Active Pen abd HP Active Pen will not work as there has been some artist community testing that listed those as interchangable.
I can say I like the feel and sensitiivty of the Acer Stylus for this machine even batter than the Dell Active Stylis I have for the old 371T.