Questions on SSM6322 Amplifier

SSM6322

1.) Not listed at Digi or Mouser. When is delivery? What is budgetary price in 1k qty?

2.) The part has an "enable" pin. How fast does the part go from off (enable logic low) to fully-settled-on (logic high)?

3.) The part has a maximum rail of +/-6.3V. Can the part achieve proportionately higher voltage output with +/-6.0V rails compared with +/-5.0V rails? Or does the IC design limit the max output to around +/-3.4V, regardless of the additional rails voltage? 

Thanks,