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The Find and Replace tool has some functionality that might meet your needs. It has the option to "Append Fields" rather than replace, so you end up with more or less a Join based on partial matches. Take a look at the attached and see if it sheds some light.
I presume that since this is Excel these aren't large data sets, as such, you could use the "Append Fields" tool, switch it to "Allow All Appends", then use a formula tool to set a Bool variable to "Contains([DC_Name],[DC Name])" and filter the result. It works with your sample data, but if your actual data has variations which result in multiple matches, you would need additional logic.