Require a keyboard dust cover for my laptop

baby_frogmella

I've looked everywhere but i cannot find a keyboard dust cover for my Sony Vaio laptop ('A' Series). These are thin plastic covers which fit snugly over the laptop keyboard to protect it from dust. I know that you can get them for Dell laptops but i cannot find them for the Sony brand. At the moment i just use clingfilm to cover the keyboard but this is only a temporary solution. Any pointers?

Thanks in advance