My S3 came with a Mulberry bag - was it not a standard option for the later models as well? The dealer did say it was meant to slide in as a glove box but it doesn't actually fit...maybe that's the reason why!
No it wasn't standard, nor have I heard of it being an option; therefore, it was either made specially for that car (on request of the original owner) or bought as a spare from the parts department.