Not sure about the windage tray as there are two schools of thought, 1) get the oil away from the crank at all costs, which a windage tray doesn't easily allow, 2) give the oil a route to get away but not allow vacuum of the spinning crank to suck up the sump, which a tray does very well. I'm sure someone with more firsthand knowledge could chime in on which results are better
Kevco's scraper does catch some oil and is good at routing it back to the sump, but a true crank scrapper has to be custom fit to the contours of the crank.
Better pans are made by Canton, Charlies, and Hamburger but they pricey fast.