Where can I find a CB-USB 6 cable or what type of cable can be used for replacement.

There are loads of them on eBay - not listed as CB-USB 6 but searching for Olympus USB brings up lots of cheap options. The E-30 cable is the same as the E-5, E-620, Tough and Stylus series and many of their compacts. In the photo by the listing you can see small pins inside the mini-USB connector that plugs into the camera. (Not to be confused with the older type cable for the E-3 and previous cameras). Hope this helps...