Momentarily shapeless, it writhed and then formed itself into a gleaming replica of a human hand, bright as moonlight, which soared downward and fixed itself upon Wormtails bleeding wrist.
This was true, though only because Harry, Ron, and Hermione had found Myrtle’s out-of-order toilets a convenient place to brew Polyjuice Potion in secret — a forbidden potion that had turned him and Ron into living replicas of Crabbe and Goyle for an hour, so that they could sneak into the Slytherin common room.
There are no more uses of "replica" in the book.
Show samples from other sources
The museum has an exact replica of the Rosetta Stone.
When the space shuttles stopped flying, the museum replaced their replica of a shuttle with a real one.