there are reproduction styluses that you can buy in four-eight packs on amazon iirc, although they're made of a harder plastic than official styluses.. which can scratch up your screen without a screen protector. i've used them and they work pretty well for drawing though, [cont]

feels pretty much the same as the og styluses. if you're worried about scratching, you could also get rubber tipped pens instead of styluses (like, the kind meant for smartphones) and most of them will also work and be much softer on your screen... albeit less precise :p

sorry for my yapfest LMAO ive just lost all my 3ds styluses over the years and been looking for alternatives myself so... :'D thought i'd try n help???