Hi guys Good news!! As you may know the regular Rotex gold pads do not fit the SRT6.
I researched the brake pad part number for the SRT 6 with Mercedes and Chrysler and got the equivalent Mercedes part number. Then I spoke to John at Brakeworld and sure enough there is an equivalent Mercedes AMG Rotex gold pad which fits my Crossifre. I have now installed them and am happy to be rid of the brake dust.

For those of you who want to know the Rotex part number is D9682D 7561-D682M