Hi Alok,
Can you check if the badi CRM_UPLOAD_BEA_FILL serves your purpose? Also please check:
1.Go to spro>crm>billing>system enhancements>business add-ins>
There you will find badis for different purposes.
2. If you have access to Service Market Place, please check the Billing Enhancement Cookbook that i mentioned in my previous post.
Regards
Nisha