Sciex OS software needs quadratic through zero option

Certain EPA methods and other methods require a curve fit that is forced through zero or the origin. The only option available at this time in Sciex OS is the linear through zero option but we need a quadratic through zero option. I have seen this feature asked for over a year ago and since then it seems to have been taken down. For PFCs, a quadratic curve works better for many of the analytes. Please add.