I was excited that I may have been able to help, but I just have issues from volumes 36 and 37... Perhaps this is for the best, as it would have deeply fed my pack rat tendencies.
I'm guessing they lost their back issues due to neglect and sometimes tragedy. When people are first starting out they often don't think that in 30 years time they will want a physical copy of their joke periodical and warehouse space is always limited. When budgets get tight it is sometimes the storage bill that has to be cut.
but it's not like a lost Doctor Who episode, it will show up eventually
meanwhile they can keep eerily predicting dystopia like the government televising executions for entertainment a year before it happens
That's here: https://theonion.com/archivehunt/