Need a alternate FM for CK_F_CONFIGURATION_CALC which can be used in background

We have created a report program which runs for 4000 VC materials and fetches costing data (not yet created/saved in the system) and displays it in ALV report. The report currently take very long hours to run. Now we want to schedule a batch job for this report but as the current report uses FM CK_F_CONFIGURATION_CALC for online costing data hence we cannot run it in background.