You can get a big brake kit from ECStuning but it costs over 1k.

Your best bet would be to upgrade the pads to something ceramic and get some good quality brake fluid.
For normal road use, the Tig stops perfectly and wil in some cases stop more suddenly than you are expecting due to the brake multiplier.

I would hit up GSLRallySport to see what they suggest.
I know Aaron uses Hawk pads and thinks they are great.