A good friend of mine makes these:
They're more than just a Butler Creek scope cap... but only a little more, definitely nowhere near a MATBOCK Tarsier Eclipse or Phokus Hoplite, and have been a hit with some very switched on NVG folks (including the training facility repped in karmapolice's pic). If anyone is interested, PM me, and I can point you toward him.
Well... depends on your needs (assuming full power is in the picture). For quick switching between short/medium/long range such as constant in and out of building to streets, for sure the MAWL is unbeatable. But the Wilcox RAID-X has some features that could put it above the MAWL in other places, given its much more fine tunable (which the MAWL necessarily sacrifices for its excellent switchology), smaller footprint, and much lighter. Either way, the NGAL is appears to be the weakest entrant of the next gen lasers, despite being the choice of SOCOM. I think the most interesting price point is around 1k USD, and whether you go for a Perst-3 or a DBAL-D2.