you could put in a general search in your area in something like swetswise, which may bring up some titles. My area is also very sparse when it comes to actual subject-specific material and I think it came up with three atricles, but when I put in a search of a slightly more general nature it gave me some articles in journals that I hadn't even thought of looking at, but which might just have the odd thing looked at from a slightly different angle, but still possibly useful, so that might be worth a try. Or ask your academic librarian?