The term "pedestal" refers just to the vertical orientation of the case (vs "rackmounted" which is horizontal). It does not tell anything about the size. The term you are looking for is "ExtendedATX" or "EATX".
There are plenty of options available. Also the way you get more drives installed in your case is by using X-in-Y drive cages. 5-in-3 (i.e. 5x3.5" drives in 3x5.25" slots) is probably the most popular one. If you want to save on price - do not go for "hotswap" ones. Hotswap cages have a backplane with interface connectors and cost over a $100. The regular "non hotswap" ones cost like $30.