I have a 220v fixture that is using 9w G23 plug in fluorescent, do you have that bulb and am I able to use the 11w G23 plug in fluorescent?

The voltage is not an issue as the unit has ballast. The ballast will transform down the input voltage the unit was designed to from 220 or 120 to the voltage of the plug in fluorescent which is probably around 20 to 24volts. You can use all the G23 base wattages plug in fluorescent unless the ballast is restricted to one particular wattage. The G23 plug in fluorescent are available in 5w, 7w, 9w and 11w