If they have the typical 4 spider pack on them you can use a box similar to the 15" BTLs. Should work quite well in the same type enclosure.
They are big, nasty, woofers //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Have had 4 or 5 over the years.