Need help : Pneumatic air tank solution for melodica

#1

I’m looking for solution of air-tank system for my melodica- "it is a free-reed instrument similar to the pump organ and harmonica. It has a musical keyboard on top, and is played by blowing air through a mouthpiece that fits into a hole in the side of the instrument. Pressing a key opens a hole, allowing air to flow through a reed."
I was thinking of this kind of solution http://www.gmii.net/products/氣動瓶蓋與安全閥和壓力表 . It is built from Makeblock pneumatic components, but I’m not sure is is good idea for this purpose. Any idea ?
I’d be grateful for help.

#2