HI Lee Lewis,
Please have a look at the note 1869560 for a comprehensive list of supported and unsupported BW elements.
Since you told that BIA and HANA options are not available, the only one remains is the relational universe on top of BW. I think you should be able to select a BW cube as a source for the universe.
(Multi sourced,JCO) --> create a Information space using Facets and Measures--> do indexing --> Show the required analyis in explorer.
BR
Prabhith