Unable to setup PO approval rules in BPM worklist based on ProcBU name

Hello,
We are unable to setup PO approval rules in BPM worklist based on ProcBU name, only parameter that seems to be available is procurementBUId.

This is an issue because we have multiple rules to be setup in BPM worklist, and we are planning to migrate the BPM worklist rules between instances using SOA Composer.
If the different instances have different Business Unit IDs, then the migration will not be enough and we will have to manually update the procurementBUId for each and every rule, which will be very time-consuming.
Hence, we need to be able to setup the PO approval rules in BPM worklist using the proc BU name and not the proc BU id.