Lower OD greenie goggles?

I have a pair of Laserglow greenie goggles about OD6 and a pair of nes_ds greenie specs which while slightly different also seem to be around OD6.

Both work fine - in some ways too well because there is often not much of a spot to see.

Does anyone know if you can get, for instance OD4, which still ought to be pretty safe but allow you to SEE more of a spot. If so, where from and how much?

Thanks

If you're in the US I can get you a new pair of WL Lasershades shipped for $46.75. They're more like OD 3 and the dot doesn't change that dim orangish color. Still stays a reasonably visible green while providing adequate protection for the better part of a watt + of 532nm.