Ammonia out of the tap is 0.25ppm, The chlorine level is 3ppm. Unfortunately - there's no clubs in my area, although I tried to start one up and no one has bothered to join yet. I am part of one in the area where my University is, but that's a good 8 hour drive away, I can't make that trip every time I need to do a water change unfortunately :[
The pet stores around here don't even have an RO system - excluding the one single family owned one which doesn't sell RO water to the public.
Sorry on the mix up for the Chlorine.
Think its time for an online unit purchase, obviously that doesn't help immediately. Can you call the company for Prime and ask their recommendation for treatment. Also you can get a few big plastic tote tubs and let the water sit for a few days before you put it in. Then once the tank is set up and filled...doing weekly pwc after sitting the water out would be a chore but do-able for an on-going basis.
The loss of the fish and the inability to solve the emergency is just terrible, I went through something similar recently, and it is heart breaking.