Depends on custom in your country also. We are always happy to help you and happy to find what you are looking for.
eBay
Silicone Protective Case for Pokémon GO Plus + Crystal Transparent Protective Case Shell with Lanyard for Pokémon GO Plus +
Aliexpress UK
NEW Auto Catch Smart Wristband Pogo for Pokemon Go Plus Bluetooth-compatible Automatic Capturer Bracelet Support Android and IOS. It only support auto catch, NO Vibration. It must be a white light when you connect.
eBay
Hard Case For Pokemon Go Plus + Crystal Storage Case with Hand Strap Transparent PC Case Cover for Pokemon Go Plus + Crystal
Aliexpress UK
Modded Pokémon GO Plus+ ,Great/Ultra Ball Auto-Catche r Has vibration for button press catching, Small switch for toggle,no speaker. The vibration works on manual mode if you would like to press the button to catch pokemon yourself with a ball of your choice.
eBay
For Pokemon GO Plus +Type-C Charging Dock Station with Silicone Protective Case Charging Stand for Pokemon GO Plus + Accessories
Aliexpress UK
NEW Auto Catch Smart Wristband Pogo for Go Plus Bluetooth-compatible Automatic Capturer Bracelet Support Android and IOS. It only support auto catch, NO Vibration. It must be a white light when you connect.
eBay
Silicone Protective Case for Pokémon GO Plus + Cartoon Anime Kawaii Pika Shockproof Shell Cover with Rope for Pokemon Go Plus +
Aliexpress UK
When a Pokémon appears nearby, your Pokémon GO Plus will vibrate, and its light will flash green. If the Pokémon is a species you haven't caught before, your Pokémon GO Plus will vibrate, and its light will flash yellow.
eBay
Silicone Matte Clear Soft Case for Pokemon Go Plus Transparent Crystal Protective Case with Lanyard Cover For Pokemon Go Plus +
Aliexpress UK
Pokémon GO Plus + (Pokémon GO Plus Plus), a new device that works with “Pokémon GO” and “Pokémon Sleep”! In addition, the Monster Ball will be thrown automatically, so you can catch Pokémon even with the Monster Ball in your bag.
eBay
for Pokemon Go Plus + Protective Cover EVA Cover Protective Hard Case With Hand Strap Compatible With Pokémon Go Plus + Game
Aliexpress UK
Pokemon GO Plus +. You can also automatically throw Poké Balls, so you can catch Pokémon even while they're in your bag. Sleep data can be linked to ‘Pokémon GO’ and ‘Pokémon Sleep’ for play.
eBay
Magnetic Charging Base For Pokemon GO Plus RGB Charging Stand with Silicone PC Waterproof Protective Case for Pokemon GO Plus +
Aliexpress UK
You can play with your sleep data in conjunction with "Pokemon GO" and "Pokemon Sleep". It also automatically throws Pokeballs, so you can catch Pokemon even while it's in your bag. "Pokemon GO Plus" has been powered up!
eBay
Auto Catch Bracelet for Pokemon Go Plus Gaming for Bluetooth-compatible Bracelet Wristband for Android/IOS Game Accessories
Aliexpress UK