You can buy it direct or on eBay. There's some legal wrangling going on between the inventor of Nano-Lube and the inventor of NanoLube. I consider NanoLube to be the genuine article.
I turn to NanoLube like Joe Workshop turns to WD-40. After I take off about .040" from the back of my Bar-Sto barrel, the last fitting will be done using NanoLube. The end results feel like skating across a perfectly frozen pond using perfectly-sharpened ice skates.
Some times that's exactly what you want, but high-pressure areas (bolt lugs, etc.) I follow up with a bit of high-pressure grease. It gives a slower sensation like skiing on jello. Smooth, silent, and almost like floating, although not as fast an action. I consider the high-pressure grease to be the snot on a perfectly-polished doorknowb.
Sweet !!!
snot on a perfectly polished doorknob.......LMAO !!