By Snow has been carrying nail appliers for a long while now. If you have never been, it is worth your while. Each pack variation has a wearable tester, which is like a demo, but usable. The regular packs are also very affordable.
Above is just one of the versions from the Bug Collection.
Slink Nail Applier - By Snow - Free Gift
Bracelet - LW - L$1 SL Marketplace Deal