The best unpressurised basket is the Breville one--with the bottom cut off. There are threads here that give more details.
The Sunbeam 0480 should do well, as should the 0450. I use a Kyocera hand mill with good results in a work Ikon.
Just pull the enhancer off (its a slip fit) and put it in a drawer somewhere. (Dont worry about which drawer--odds are itll never come out. ;D)