I understand that the S-pen does not work on an S8, only on the Note or a tablet.

Any recommendations for a good stylus suitable for handwriting on an S8?  A myriad of options on Amazon, eBay etc but quality seems very variable

Preferably something capable of relatively small characters, as per pen on paper. Possible?

Would prefer not to have to go to a Note.  S8 is around upper limit for size that I would find practical.  Besides S8 is still 'new' so would be hard to justify swapping it out for a Note.