SEM-BCS data extractor from ECC general ledger table(s)

We are a utility company working on an SEM-BCS implementation and use the FERC solution. We do not use the new GL. We are trying to extract the transaction data from ECC to a BI virtual remote cube. We cannot use the profit center extractor (0EC_PCA_3) as the profit center tables do not contain any ferc data. We need to be able to extract the transaction data from a general ledger table. We have run into several issues with various extractors we have tried because they donu2019t allow direct access (0FI_GL_4) or are at a summary level and we canu2019t extract group account, trading partner, and transaction type detail (0FI_GL_1). Would you have any suggestions on how to extract general ledger data with the detail information required from ECC to be able to load to a BI virtual remote cube?