There have been credible claims of a handful known to be out there with collectors, in particular Web of Fear 3 seems very likely, it would likely be a number in single digits if there are any. The problem here is that it says there are 97 missing (true), but then could be taken to mean all of these are missing because collectors have them. Rather they are all assumed to have been destroyed, but it is possible a small number escaped that fate and are still out there in the hands of collectors
Yes, my local is a Drakes too, and one of the next closest is a larger Drakes that I occasionally go to for things I can’t get at the smaller one, but I’m pretty lucky - I travel by bike, so I do depend on what’s available fairly close. About every 3 months or so I’ll drop into Coles for one occasional item that I can’t get at Drakes, and I hate it - the self-service checkouts, the aisles filled with Coles-brand items … just the whole experience is shit.