You are out of luck. The JCE cedula checking site was for people to check that they were on the electoral roll and was taken down after the elections. Each of the political parties also had an online system for people to check where they should vote but those are down too.
There are ways and means of checking a cedula now, none as easy as before. The cedula checking system is now private but companies such as banks, money lenders, some lawyers, mobile phone companies etc have access to it, so you may have a friend working in one who can help you out.
Matilda
