Reloading .303 British : Where has all the Powder gone?

I tried buying IMR3031 and IMR4064 when all the covid crap started hitting the fan and all I found was,"Out of Stock". As an emergency backup, I found a limited supply of Varget but mostly, "Out of Stock" as well. I ended up finding the 3031 and 4064 along with N202 at a local reloaders store here at an unbelievable discounted price.  They had what appeared to me at the time as the only 500 count box of .308  Sierra 168grn TMK's so, I snatched those up to.