You can use this AppleScript :
read (choose file with prompt "Select the TEXT file wich contains names") as «class utf8» set tNames to paragraphs of the result tell application "Finder" to tell target of front Finder window select (files whose name is in tNames) end tell
I presume that the names in the text file contain the name extension
It works if the encoding of the plain text file is "UTF8", if the encoding is "MacRoman" removes as «class utf8» in the script.
The source folder is the front Finder window.