Check "completed listings" and search for "Paradisea". Make sure you get the spelling right. If there are none on there currently, he will list some soon. Just buy one using "buy it now". Here is one listing:
http://cgi.ebay.com/TDA1545A-Non-OS-USB-TUBE-DAC-Paradisea_W0QQitemZ120238826700QQihZ002QQcategoryZ14978QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
The Oppo is if you don't buy the Linn, then you want a CD player. It is a good value, and you can input it into the Paradisea DAC, it may sound even better that way. You can buy all your cables from Blue Jeans cables.