Precomputed reference indices are available on Caltech Data:

Pre-computed PalmDB reference index with human genomic and transcriptomic sequences masked using D-list: palmdb_human_dlist_cdna_dna.idx

Pre-computed PalmDB reference index with mouse genomic and transcriptomic sequences masked using D-list:
palmdb_mouse_dlist_cdna_dna.idx

You can find the t2g file and predicted taxonomies for each virus ID here.