looking for 2.7mm Pentalobe #2 screws

I'm looking to buy at least 1 two 2.7mm Pentalobe #2 screw. I lost one changing the battery on my phone: Xiaomi Mi A2 Battery Replacement

The closest I've found is at MacBook Pro Unibody Lower Case Screw Set - these are a bit long but might be useful.

eBay has lots of iPhone and iPad screw kits that contain Pentalobe screws - the problem is that they don't list measurements for any of the screws. Does anyone know where I can find these (or something close)

Thanks for your help