oh cmon, it's literally sold on craigslist and the 'dark web'.Can easily see how someone would struggle.
A 45 or 55 years old parent living in a nondescript suburb. Haven't touched anything wilder than alcohol since they were about 30. Their old housemate's friend or old friend's housemate they half-knew in 1992 is but a memory. Probably don't have twentysomethings in their social circle. Unlikely to outright ask their nephew or youngest co-worker where to get some.
They could find some eventually if they really wanted but it wouldn't be simple.