Laura Mercier Flawless Contour Palette $69. 3 contouring shades + 1 highlight + 1 bronze shade. Another one that I've used in my professional kit and on myself personally for a few years. One of my faves!
Revlon x Chloe Morello Sculpt and Highlight Contour Kit. This is essentially the ONLY powder contouring palette you need in your life. There are 4 shades per kit - 2 contour + 2 highlight and it's available in 2 tones to suit lighter and darker skins. The powders are more buttery than any formula I've tried before and are very easy to blend. The best news? It's only $24.95.