PDM replace underscore with slash in variable

Here's my scenario.  In my PDM data card for SolidWorks files I have a variable named "Part Number" and it's default value is "File Name without extension"

We have some part numbers that have a slash in them.  for example:  1_4-28

obviously windows doesn't allow a slash in a part number, hence the underscore. 

Is it possible to do a replace in a string in a PDM variable?  Basically want to have another variable that references the "Part Number" variable and replaces the underscore with a slash to give you:  1/4-28.

original variable:

"Part Number" = 1_4-28

new variable:

"Part Number Replace" = 1/4-28

Thanks - Eric

SolidworksSolidworks Pdm/enterprise Pdm