Hi there (in Italy) :)
This is Bogdan from Romania. I'm a mechanical engineer specialized in the industrial robotic field, 3d designer and modeler.
I would like to work with you on this project.
About the project. If you want to replace the goggles/mask with a pair of lenses, you have to take under consideration the "fish eye effect" which deforms the view (because of the lenses, and have a compensation for this (the simplest is a double lenses assembly). Another thing to think about is the sealing around the eyes - it has to be soft, elastic and water tight.
I could design your device, with all the details I've told you here.
How I'm working: based on your input (drawings/sketches/models, etc) I'll make a primal model (the rough model). On this model, with your assistance I'll make the required adjustments/modifications/changes until you'll consider we've reached what you desired.
When the final model is approved, I'll send you all the necessary files.