Spanish LI150 keys.

Just finished refurbing a mates 1980 Spanish LI150 and I'm looking to replace the worn out ignition key.
I'm assuming its a factory original that I have.
Its labelled "Casellas" No 11230
Does anyone know where I can obtain a replacement from this info?
I'm assuming its a factory original that I have.
Its labelled "Casellas" No 11230
Does anyone know where I can obtain a replacement from this info?