Similar to most of the others, though for whatever reason I decide to use Find & Replace + Join + Union, instead of just Join Multiple (which makes WAY more sense seeing the other solutions after the fact)... It worked though. And cool way to learn about the Field Info Tool!
* Question: Anyone else find it odd that in the Field Info tool, it doesn't actually tell you which tool it's coming from in the Source column? For example, shouldn't it have the "Text Input (1)" and "Text Input (2)" listed in the Source field, which might be nice if you were trying to do something like Dynamic Rename of the columns based on source input? I could be missing something here. Maybe it acts/looks different when pulling from something other than the Text Input tool in the workflow. Thought it seemed odd that it just said "Text Input:" though.