Sandisk Sansa Player Cables?
 

Do the Sansa line of DAPs use the same usb cables as the Sony Walkmans?

dont think so, you can get a sansa cable really cheap on ebay, same cable works for the e200 and fuze, the clips use normal mini usb.

"Do the Sansa line of DAPs use the same usb cables as the Sony Walkmans? "

It depends which players. The Sony E345 uses a cable with a standard mini usb connector, which also works on the Sansa Clip and Sansa Clip+. The Sony S series players use a proprietary Sony cable, and the Sansa Fuze uses a proprietary Sansa cable.