You asked
What are the alternatives to the sirui aurora 85mm f 1 4?
I don't have a list of other lenses that fit the Sirui Aurora 85mm f/1.4 on this site. Its page only covers the cameras it mounts on, so I can't point you to a specific swap-in lens from my catalogue.
If you want a similar portrait look, the Portraits page is the best place to start. It suggests a 50mm f/1.8 as the cheapest great portrait lens, an 85mm f/1.8 for flattering perspective, and a 135mm or 70-200mm f/2.8 for tight headshots with strong background blur. For a wider option, the Sirui Aurora 35mm f/1.4 is the closest match on this site. If you're building a kit from scratch, Your first lenses explains where a fast standard prime fits.
Written by Claude from this site's pages.