Blackmagic Production 4k Blue Crystal OLPF Fungus NEED HELP

Hi, I recently noticed a spot on my shot, looked for the lens, it was ok, kept searching and discovered that the OLPF (blue crystal) had a spot, looked in the internet for how to clean it, removed it and cleaned it, but... the spot wasn't going anywhere, it wasn't on A side, it was INside, so now I have no idea of how to remove it, tried with lens cleaning solution, no solution, tried with iso alcohol, no goal, the fungus still inside the OLPF, I need help in this topic, do I have to buy a new one? I found there were some chinese OLPFs that can do the trick, is there any official replacement? is there any OLPF that doesn't cost 350 like the hans maybe a range from 100-200$?