What I want to do is use Photokit Creative Sharpen Luminance 1-4 settings; but in Lightroom.
No, at this point in time the "creative sharpening" available in Camera Raw and Lightroom via the Adjustment Brush is, uh, let's call it a placeholder for some more useful in the future? The Sharpness slider is a hack on the old ACR sharpening algorithm and the minus sharpening is, well so convoluted that I don't think I could explain it to you...
So, no, ACR & Lightroom have the capture sharpening down and Lightroom (more so that ACR) have the output sharpening down but creative is yet to be properly implemented...expect great things in the future :~)