Would an MTS 1708V Case Fit a B&S PT 15?

[Triggerfish]

Does anyone know if this case would fit a B&S PT 15? For some reason the manufacturer says they don't have any cases to fit a PT 15, but they recommend the 1708V for a 5/4 Rudolf Meinl F tuba. And if I'm not mistaken a Rudolf Meinl 5/4 F is about the same size as a PT 15?

Also, if anyone has any case recommendations for a PT 15 that would be appreciated!