How to bring Alternative a/c number (ALTKT) into costing reports

Hi,

We are using Country chart of accounts, as a result we are using Alternative account number in GL master data. I could able to access alternative a/c field in GL line item report (FBL3N) by activating special fields in that report itself.

Now I would like to bring this field into controlling reports such as KSB1 - Actual Cost Centre Items; KOB1 - Actual Internal Order line items. I'm not quite sure how this can be achieved. Any help in this regard is much appreciated guys.

Thanks,

Harika.