Whatever happened to Z-ALT oil?

Website is still up and running....but looks like the oil is out of stock. I bit and bought a case for the Scamp a couple yrs ago. Must have been the vintage cans that sucked me in LOL. But it's pricey and the market is flooded now with these high zinc oils for flat tapped cams in hot rods. People probably buying Comp, Joe Gibbs, Amsoil etc because its the big name guys and its brand recognition. Just my thoughts. But maybe they are just having supply issues who knows