on ebay I see larger maf bodies that house stock maf's. That said, mess with the maf leads to a long path of misery.
First it will stop working, and you are going to go, shit!!!!
then you are going to order one off of eBay thinking it will work since it's 1/2 the price, either a used one, or a new Chinese POS, and then when that does not work and you just tossed some money away you will:
buy a used one off of this site, junkyard, or new and that will be your 600 dollar lesson that you should not mess with the MAF on a street driven car.