You can click on this link to order the adaptor

this will work, make sure your model number is there.
http://www.mypdastore.net/1-10981681-B001T8BFVA-DC_car_power_adapter_for_CURTIS_DVD8039B_DVD8402_DVD7015_IP844_DVD_8009_DVD8017_DVD8078_DVD8007_ASTAR_PD_3060_PD3060_PD_3020_PD3020_DIGITAL_LABS_K725_DL_840PD_DL840PD_portable_dvd_players.html

Www.ebay.com and www.craigslist.org may have them.