No fast way to search for Lowe's clearance tools, unfortunately. The Lowe's clearance page only shows things that are being cleared out nationally, not things being cleared out in phases the way most things seem to be. For the last month or so, the only tool has been a 4pc NiCad Porter-Cable set.
The most efficient way to search for clearance items at Lowe's is still to go to the store and start walking the aisles. If you do that three or four times a week, you'll quickly figure out where you need to walk and the fastest way to check the necessary spots.
I go to the mistint rack in paint, then do each and every tool aisle, then the hardware clearance rack...where they put tools at my store when they need the tool department shelf space for the replacement SKU, then finish up at the hardware desk...where they keep tools that have been freshly marked down but not put on a shelf yet and open box/display/missing items stuff.