Wested aren't the only people who make a ToD jacket, but they are the most affordable. Plenty of information in the which jacket do you own thread about measurements etc. Have a read of the last few pages of that.
I will say the ToD jacket isn't the best choice if you're not average/slim build. Quite a tailored jacket, and screen accurate in that regard. If you're carrying a bit of extra weight around the stomach I would consider the Raiders or LC jackets instead.