Rock auto has slotted and drilled 11.75 rotors, look up 78 Cordoba.

As for aluminum calipers, nothing that is a direct, bolt in replacement. Several options to put other stuff on, like Andy showed you, but no "stock caliper but in aluminum" type options.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.