Helmet/Visor SWEP

I was wondering if anyone had the time to make a helmet/visor weapon, something similar to to this:

It would work as a SWEP, simple, you spawn the SWEP on the floor and walk over it, to pick it up, the scroll through your weapons and select it, then use your primary fire to equipt it. When you equipt it, it provides this overlay from the download above:

And it also places the gasmask from this pack on your head:

If anyone could work on that for me I would be happy. :3

Simple Needed: A Swep that when used places the overlay and prop on your head, and when clicked again, takes it off. MUST be a SWEP!