If its just a 1JZ (not GTE) the stock pump will flow enough for him, as stated its good for 200rwKw plus. If you want to try and improve on that a Bosch pump from a EFI Camira JB-JD flows more at higher pressure and is designed to be an externally fitted hi-flow pump. Rock on down to your local Nick-a-Part and try and find a 'fresh' Camira still with its original fuel pump.
Cheers,
Mitch.