Broken Model Airplane :^(

[Z-Tuba Dude]

Well, I don't know my own strength!

Last night, at rehearsal, I was playing along merrily on my tuba, and then *POP* the wrapped wire portion of the model airplane parts, which make up my rotary trigger mechanism on the 4th valve, broke in half. (I have always had strong pinkies --- even as a kid) : )

The previous owner had them installed, and I know nothing of how to repair, or even how to get parts for them!

Can anyone enlighten me?

THANKS!