fixing power window

[karmaken]

My driver side window recently died. took the door panel off to discover that there is a small white plastic piece that holds secures the window to the cable. I am trying to find out a part number on that piece. Also, the cable is slightly frayed. Should I replace the cable and how much of a pain is that to accomplish?

Another question, how hard is it to find interior pieces? I need to replace the cover on the driver side door sill and the trunk release handle.

Thanks in advance,

Ken