Hello, I'm not sure where your located but You can buy them online.. Try: eBay (Found one for you here - $13 http://cgi.ebay.com/Atari-7800-Power-Supply_W0QQitemZ370250141421QQcmdZViewItemQQptZVideo_Games_Accessories?hash=item5634a0ceed), Kijiji or http://www.atariguide.com/store/products.htm
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Hello, I'm not sure where your located but You can buy them online..
Try: eBay (Found one for you here - $13 http://cgi.ebay.com/Atari-7800-Power-Supply_W0QQitemZ370250141421QQcmdZViewItemQQptZVideo_Games_Accessories?hash=item5634a0ceed), Kijiji or http://www.atariguide.com/store/products.htm