I also swatched in some leftovers from my Saltings sweater (sock weight merino held with silk mohair from Onyx Fiber Arts, now sadly closed); but there are so many of these combinations of stranding a wool with a silk mohair out there that I think you have plenty of options. Ones that spring to mind are: Catherine Lowe, Knitting for Olive and Bises & Bûches or you could hold a thread of De Rerum Natura’s new yarn Bérénice or Rowan Kid Silk Haze with another yarn. The possibilities go on and on.