FYI, saw some Buffalo Bore ammo in 475 Linebaugh on the shelf at a small town LGS couple weeks ago. Of course, the cost was in the stratosphere so I passed on it. Rolling my own works fine anyway. Still, kind of heartening to see it in stock after such a long absence. Didn't see 480 Ruger.
On a side note, there seems to be a peculiar phenomenon. Throughout the pandemic and continuing today, ammo, brass, powder, and especially primers have been far more available in rural areas than metro areas. If I drive 50 or more miles beyond the metro area, bingo, availability and in calibers never seen otherwise (and most often at lower prices to boot). I don't get why that is, but that's the main way I've been stocking up over the past three years. I did ask the LGS about that a few weeks ago and he thought it was due to scalpers; because he knew most all of his customers personally in that small town he never allowed them to just buy out his stock and resell online, but he suspected that is what's going on in metro area gun stores. Maybe, maybe not...