Vizlib Custom Report - Mashup Export Options accept Expression/Variable

In the Search/Replace area in the Custom Report options for exporting from externally hosted mashups.  The drawback I have with this is when we promote from our Dev to UAT to Prod environments the Replace Value has to be changed.  I can do so in the Dev environment but not in UAT or PROD.  Can the Replace Value area be enhanced to accept expressions or variables? 

Expression (or include in load script as a variable):

i.e. if computer name = dev then replace value = abc

              if computer name = Uat then replace value = def

                          if computer name = Prod then replace value = ghi