Why are you looking for this size?
Whenever you upsize, you should take into account the actuall height of tyre housing from ground and this should not change by more than 1mm and acceptable standards are upto 5mm max.
So stock size of Aqua is 15 and stock tyres are 185/65/15 so if you want to increase rim size to 16 you should decrease sidewall height to maintain handling and calibration of various sensors (ABS, EBD, ECS, speedometer). So best would be to go with 205/55/16 which is stock size of Corolla and is readily available. Bridgestone, Dunlop, Michellin, Continental, Yokohama, Hankook, Kumho, Horizon, Nexen, Triangle, Pirelli, General all have this size available and its gonna come down to your pocket. I would also recommend to weight the stock rim and the new 16in rim and keep the weight difference to mininum because available chinese rims weigh much more than stock rims !!!