Face Shields For Resuscitation

[sungod]

Fellas, does anyone know where I can obtain the simple face mask protection for giving mouth to mouth. Basically a plastic sheet that covers the Patients face, with a one way valve so the person giving the breath can do so with no chance of 'Blow backs" I need around 20.

I've tried the local hospitals here in Pattaya, Fascino etc, no one has see them before, one guy at a hospital thought they were such a good idea that he wants them too!

Thanks in advance.