Hi, if you look at method 2 of this post, following this you should be able to include an unsharp mask if you want to look exactly like the Epson conversion. Scanning Film Negatives with Epson Scan and Negative Lab Pro
You could also use the sharpening tools in Lightroom, but the sharpening tools will work differently than an unsharp mask, so it may take a bit of work to find a setting that works just right.
-Nate