Show Me Cables in St. Louis has by far the most extensive selection of 6”, 1’, 2’, and all other length power cords of all types that I’ve ever seen. Different colors, all kinds of right angle plugs and so on. I used to buy short power cords from Middle Atlantic but discovered them and never went back. Idk if they’re manufacturing them or buying them but you name it they have it. Perfect for neat racks. I usually do that for all components and a vertical power strip the length of the rack. Only thing is when you have a brick power supply you’re stuck with winding up the LV side of it but if the 120VAC side is modular you can at least make that a short one.