Thought there was a small reactor that generated some, but alas they are sold out.
There are a few ways to generate ozone at least, one method is a glow discharge plasma.
Think the problem is that peroxide is a little hard to get though its possible to make
at least drug store 9% grade fairly simply.
Ozone from a DBD unit bubbled through water with an aquarium pump isn't that difficult but safer to use the positive pressure method or it will eat the pump rubber and plastics in short order.
Note that this *might* upset a few folks at Homeland Security but to be honest they can
go and whistle when lives are at stake in the current pandemic.