Considering another set of lowering springs costs anywhere between $180-$240 new, I'd suggest cutting the current set of springs.
But my only concern would be that since you got the Eibach Pro-Kit, aren't those progressive springs? That would mean depending on how much and where you cut, the initial spring rate will change. I know their progressive kit for example will have spring rates between 80 lb/in and 225 lb/in depending on the amount of compression.