WEBER 32/36 dfev to dgav

Hi all, I've been having some troubles with finding a filter for my Weber dfev 32/36 it's been quite a nightmare actually, I was looking to put a ramair filter to replace the empi filter that's already on there, however I can't seem to find any type of filter that fits this carb except from the round empi ones, does anyone know if there's an adapter I can buy, or I might even have to get a new baseplate cut?, I'd appriciate any help at all, the carb in question is the one on the right.