When is Linden labs going to raise the trading limits for Supply Linden?

I can't get my trading limit raised from a currency trader level 2 to level 3 but must compete with Supply Linden selling L$ at 267/1 at such a rate that he will hit his $1,280,000 30 day limit by the end of the month. When this happens when will Linden Labs raise Supply Lindens limit and to what level?