2017 Lithuanian -A new obligatory requirement for tax authorities prescribed by law

Hello Team,

Our client is planning to implement Lithuania legal tax requirement 2017. I raise support ticket to SAP but I got replied as below.

"Let me inform you that the development of a Lithuanian solution for SAF-T is not planned by SAP.

A solution will be provided by SAP partner InnoForce."

Currently I am looking two options:

1. Go to complete custom development to meet Lithuanian legal requirement - any one working on this solution ?

2. SAP Dart tool - Any one worked on Lithuanian legal requirement on Dart tool?

My system verion: SAP ERP Central Component 5.0