ImportError: No Module named 'driver' in pyttsx

Well, the problem seems to be addressed in the following post
import pyttsx works in python 2.7, but not in python3

Can anybody enlighten me if there is any pyttsx library that is written in Python 3.X?

Yes, please use the following version:
https://github.com/jpercent/pyttsx
It is a Python3 port of pyttsx which seems to address the problems you face and targets Python 3.X versions.
For example the error you see (ImportError: No module named 'drivers') is addressed by the following commit
https://github.com/jpercent/pyttsx/commit/f035083338f39f7d93b0c610fbef0bb55fc9fc1c
which was merged in the aforementioned repository.
To install the pyttsx python module, you can

pip install git+git://github.com/jpercent/pyttsx.git

or

pip install git+https://github.com/jpercent/pyttsx.git

or

git clone https://github.com/jpercent/pyttsx.git 
cd pyttsx 
sudo python setup.py install  

or do that inside a virtual environment if you use them. You can avoid using 'sudo' to install, depends on the environment you use and how you organized the packages (locations, etc.).
Of course, use the right python (python3) and pip (pip3) as you have in your environment.
Please remove and clean the previous pyttsx package you had there in the environment.
In addition, you can visit http://pyttsx.readthedocs.io/en/latest/install.html
for more details on that.

site-packages hasn't included your PY_HOME or PATH. Please open Enviroment Variables and add it to the System Variable.

Add something like below, also you will see required packages under the folder.

C:\where_your_python_installation\Lib\site-packages

Hope it helps