Amazon, Waterstones and Blackwells all have an admirable range of books about foreign languages but apparently not many in them, and a quick look on Google just seems to turn up a number of sites which are either quite dodgy-looking or completely defunct.
I know this is a slightly odd request, but given the board's collective experience of both academia and trawling the internet I figure there's a good chance that someone will be able to help. He says, confidently.
Cheers.