Nice pic. So what are they? I'm not familiar with that style of glasses, it looks like a second set of lenses off to the side of first. Differently shaped too.
I would guess that's a real-world set, rather than a custom made for the film set?
Those look more like glacier glasses than regular Lennon glasses. They have the leather over the bridge and look to have the "blinders" on the side.
edit: Some searching shows that style seems to be used in old welding goggles as well, so that may be a good place to look for the others.
Also, if push comes to shove, there are some tinted Chinese military goggles that could be retrofitted into a pair of glasses similar to those pictured.
I know I'm Necro-posting here and I apologise. But I just got hold of these and thought others might like to see, just to show they are out there if you look closely.....