Casio EM-500 USB Cable?

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I recently picked up a Casio EM-500 for a good price, but it's missing
the USB cable (Casio JK-582CA,
http://www.casio.com/index.cfm?fus [...] JK-582CA).
Unfortunately they don't stock this item anymore, so I was wondering
if the cable is proprietary, or if a similar cable (like this one
http://cgi.ebay.com/ws/eBayISAPI.d [...] tohosting)
can be used. If not, any suggestions as to where I could pick up a USB
cable for the EM-500?

TIA, any help would be greatly appreciated.