Welcome to the forums Josh!
I believe Galactic Armory has been approved using his files so with the proper fit and enough sanding you should be able to as well! The links Scott posted are great resources for all things Clones and should give you a wee bit of reading and research to do.
Once you do start printing, sanding, more sanding, more sanding and painting please feel free to start a build log so we can see your progress and we can hopefully provide some help and advice along the way.
We have a number of folks who 3D print here as well, which filament are you thinking of using for your armor?