However, there are several dealers out there - Nick Carter (Carter Tools) being one of the most reputable out there.
The reason everything is 'based' on the Taig is that Taig does not actually sell complete CNC machines. People convert them. Even the machine you saw going to the official Taig site is really not on their site - if you look its actually just a link to another site of someone who mods them into complete CNC machines. They are not the only one, either.
Its also possible to just order the parts yourself and assemble the kit from scratch in a couple hours or less. All Deepgroove does is drop ship you the same parts anyway (except they might be used merchandise, or stolen merchandise, or simply not get to you). But if they did get to you, you could have still bought the exact same ones and done it yourself for even cheaper.