o-like 400mw lenses?

Are there any lenses available that will fit onto the old style o-like 400mw...

What can i expect to find if any?

I guess they are identical to the ones used in all green DPSS modules. At least the characteristics of them will be the same and probably even the size. They all are AR coated glaslenses.So far I would go for a cheap green module and use the lenses in it if you have to replace them for some reason. That will be cheaper than buying them separately.