Rather than cut, you just use the toytec spring perch spacer. It basically does same thing as if having the added notches. I did look up other springs that should work. Eibach and king makes them. King is the best price. It’s a 14” length , 3” internal diameter, 650 or a 700 pound spring rate. Either may work but only add about 1” or so of lift over the 1” you get from the Trd Pro kit. Dobinsons offers similar but normal stock spring rate. But I need firmer to handle extra weight from a plate bumper and winch I’ll be adding