Since it will become official, a “blob” immune trait could be a quick fix. Very little healing, slow even with first aid, and mutagen don’t work. Perhaps the benefit of it would be the ability to use anything that mutates the player without cost, and various other creatures can’t piss in your gene pool. I’m not sure of the mechanics of the fungus but I remember it having a few similarities.
There is still a bone puree in the eye if it still exists, and those rare injections. Maybe start with a few stims, or near a Mr. fixit that needs to be fed more bone to keep working.