I don’t mean to be blunt: BUT---------
At what point is your health to expensive?
Particularly the health of your loved ones
Do a search on the internet, in fact you will find that eBay have plenty of them, in fact you could pick up a six stage one for around $270,
That is a small price to pay for health, the replacement osmosis skins are between $50/$70 they last for around two years.
If you add a silver impregnated filter, and a table spoon of Magnesium, to each 5-Lts of water purified: you have all that’s needed to escape from the poison.
Possibly have your pineal gland on the road to recovery also.