CALM Test Cases API - solutionProcessFlowId, solutionProcessFlowDiagramId for SAP Standard Processes

[#1]

Hi,
We're looking to utilise the CALM Test Cases API to create test cases and link them to SAP Standard Solution Process Flows.
The steps provided in SAP Help to retrieve all the relevant input for the Test Cases API for Custom Processes (contentPackageId: Custom), in which case we can use the Custom Processes API to get solutionProcessFlowId and solutionProcessFlowDiagramId.

But what do I do for SAP Standard Solution Process Flows?
Has anyone find a useable way (i.e. mass processing) to get these IDs for SAP Standard Solution Process Flows (contentPackageId EARL_SolS-013)?

Cheers,
Sandra