Take a look at these:
http://www.avojdm.com/product_info.php?cPath=26_54_60&products_id=109
http://www.avojdm.com/product_info.php?cPath=26_54_60&products_id=108
The first has an opening of 180mm X 119mm, the second, 200mm x 100mm. At least you won't have the button holes from the Spec B to cover up. Also, they are Subaru OEM, so they'll fit like a glove. They're not cheap though.....