That cable just unplugs from the heater element and if you pop it off and take it to a parts store they should be able to get you a new cord. On my car, you can see the plug from underneath, but have to reach down from above to unplug it...not as bad as it sounds.
I was able to unplug the cable by reaching down behind the exhaust manifold. I've got an old extension cord I can splice onto the old one. I plan on trying that out before I go out and buy another cord, I'm on a student budget so a new cord or block heater will be my last option.
I know all about the tight budget bit....all too well. :wink:
Make sure you solder the splice and use good heat shrink. Black tape (electrical tape) will work, but heat shrink is better.
The solder, splicing and heat shrink are on the menu.