http://www.mec.ca/Products/product_d...=1265395206853
Might fit
From the description:
Small is 13 x 18 x 2cm. Regular is 16 x 25 x 2cm. Regular size has dual internal slash pockets.
Though if you have the Sony cover with light, it might not fit in the "small" case because the width I think may be greater than 13cm.