Type aware replacing

I’m working with a dataset that has missing values and therefore use the Missing Value node to to replace missing values with reserved ones depending on the column type. I do this to be able to merge on missing values.

Now i want to undo this replacement before writing to file, but i struggle to find a way to do this depending on the column type.

Using a Multi Column String Manipulation node works well if i convert each cell to string, but i lose type information and ids are converted to decimal representation in a string type column.

How can i achieve type aware manipulation similar to the missing value node?