I've got a solo harmonica in C. It's a Hohner Marine band. Not easy to get hold of, as it doesn't seem to appear in the regular Hohner lists. It's okay to play but build quality isn't so good - I had to put filler top and bottom to protect my beard and moustache!
I generally use a chinese made solo harp now - it really is inexpensive and very good value as well as a great sound... sometimes on stage or for recording I use a chinese made melodica - now that's fun ! Best of luck.