AC Adaptor Charger for Casio CTK-710, CTK-720, CTK-731, CTK-800 Keyboard US Plug | eBay
Casio CTK-731 Synthesizer Keyboard Arranger | Very Rare | Reverb
Casio CTK-731 Portable Keyboard with AC Adapter for Sale in Lutz, FL - OfferUp
HQRP AC Adapter / Power Supply for Casio CTK-720 / CTK720 / CTK-731 / CTK731 Keyboards Replacement - Walmart.com
New 12v 1.5a Power Supply Adapter For Casio Electric Piano Keyboard Ctk-750 738 5000 811ex Ctk-731 Ad-12cl Fc2 Ac/dc Charger - Ac/dc Adapters - AliExpress
12V 1.5A AC DC Power Adapter For Casio Electric Piano Keyboard CTK-750 738 5000 811EX CTK-731 AD-12CL FC2 Charger - AliExpress
CASIO CTK 731 KEYBOARD AND STAND | #269172862
AC/DC Adapter Charger Power For Casio CTK-3000 CTK-731 CTK-620L CTK-611 CTK-593 | eBay