You can have the numpad on the left, but I rarely saw keyboards like that. I saw some odd "left-handed" rubber dome keyboards, but that's it. You can also have a distinct numpad and put it anywhere.
This is why I use TKLs. I use a separate Leopold mechanical numpad placed on the left, so that the home row keys are more or less centered in my keyboard tray and under my monitor.
Also much nicer for playing Civ and other games that don't use WASD for camera control.
It also helps when you need desk space for things other than computer use, but I admit that benefit is marginal.