Many thanks for your input weeble1688.
Light Gray it is!
I´ve already identified several bricks in some e-stores, including the translucent-red and translucent-green ones.
I guess the translucent-yellow, the printed bricks and some other special parts will not be that easy to find.
As you indicate, It is definitively a fantastic set (I used to own one as a child, but it is no longer in my possession).
Buying/trading, organizing and putting together all the bricks will bring some good memories.
I believe this is an interesting project to share, so I´ll keep you guys posted on the progress of this particular build.
Regards,