Yes, you can use combination of XPSExplorer and XPSExport to export federation objects only as below :
1. Using XPSExplorer first search for all the XIDS of the "PartnershipBase*" objects.
2. Copy all the XIDS file to a text file say - fedxid.xml
3. Then use following XPSExport command to export all Partnership Federation objects :
XPSExport <outputexportfile.xml> -xf fedxid.xml -npass -vT
4. By default the ExportType is "Add". If you want to override existing Federation Partnership, then manually change the ExportType to "Replace" before import.