Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Casio CTK-571 Keyboard - US Plug : Musical Instruments
Universal DC power adapter charger For Casio CTK-495 CTK-496 CTK-500 CTK-501 CTK-510 CTK-518 CTK-519 Keyboard
Sweet Casio CTK - 501 / 518 MIDI Keyboard with Power Supply Cord | Reverb
Casio CTK-501 keyboard /piano tested and good working condition | eBay
Amazon.com: MaxLLTo 9V Power Supply Cord Charger, 6 FT Extra Long Replacement AC Adapter for Casio Keyboard CTK-500, CTK-501, CTK-510, CTK-511, CTK-515, CTK-518, CTK-519, CTK-520, CTK-520L, CTK-530 : Musical Instruments
Casio CTK-501 Keyboard User's Manual, Used and 50 similar items