New Instruments and Instrument MIDI

I was working on this piece when I decided to replay the piano with the koto, and make a piece that combines traditional western themes with eastern instruments. However, I'd also love to include an erhu (Chinese violin) and replace the violin I have. Problem is, there is no erhu ;-; I love the beautiful sliding whine it makes, like a melancholy opera singer. It'd be cool to suggest new instruments and their MIDI for Musescore to incorporate in their compositional software.