Join Date: Feb 2013
Location: Toronto, ON
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With the understanding that the smart is a unibody vehicle and there is no "frame" ...
You could use the rear subframe and drive assembly, which is a complete powertrain and rear suspension module, and you could use the front subframe and steering assembly, as part of another vehicle. This is, of course, conditional on that bodyshell having all of the correct interface points built in, and the vehicle's dimensions being appropriate.
A quick check of your first link finds the dimensions of that vehicle, with a width being substantially wider than a smart.
It is pretty likely that this bodyshell was designed around some other type of powertrain ... in which case, substantial structural modifications would probably be required to use anything other than what it was originally designed for - whatever that may be.