This shows some of the difficulty transparency / slide photographers have. Many don't have the equipment or chemistry to print optically.
My suggestion is to accept prints from a Lambda or Lightjet. This way the image was captured on film and printed using wet chemistry on photographic paper Like Kodak Endura Metalic or Fuji Crystal Archive not an inkjet. Also, I'd get the print made at a professional lab vs Wal-Mart. It's the best compromise if you can't print Ilfochromes.