We manufacture compact power supplies for midi accordions.
Prices atart at £99 to £199.
These are usually better than the originals and smaller but with full functionality.
Do you want to get rid of that large power supply which is common with many midi systems?
Ours are both compact and come with a soft pouch so that they can be placed safely in the case with the accordion.
Even better is the option for the MidiRig expander to power some accordions and do away with the original midi power supply all together!