SMW60N06-18 sub for Orion NT200

Hello , new user here, I'm looking for a sub for said number in title. One shorted so I need to replace the 8 on one side and suppose I should duplicate the other channel as well so they are from the same production run. I appreciate any feedback ahead of time, this amp is just a personal project for myself and I'm sure I'll be back again with more questions and photos.