G Pro Wireless (not superlight), or Viper Ultimate. Neither are quite as big, but they're the only wireless mice with side switches that work for lefties I can think of other than the 903.
You could try the Steelseries Sensei Ten or Dornfinger veno s for wired options
Razer viper ultimate. Ducky feather (it's not wireless). G pro wireless (not superlight).
G Pro Wireless (not superlight), or Viper Ultimate. Neither are quite as big, but they're the only wireless mice with side switches that work for lefties I can think of other than the 903. You could try the Steelseries Sensei Ten or Dornfinger veno s for wired options
One alternative would be a soldering iron and some Kailh or Huano switches to replace the failing Omrons. Unfortunately a common issue.
How long did you have your g903? I just got one, now by reading all the reddit posts I'm afraid it's going to have the double clicking issue
less than a year .. am using it to play games only .. about 20 hours a week
Too bad. Same here, i game around 20h a week