[Highland Park] Rocket Box needed

Hello Highland Park neighbors! We are in need of a Yakima or Thule-type Rocket box for luggage, etc. to put on the roof rack of our car. We have one that does not fit our current roof rack components and need one that can be adjusted to the rack crossbars. Does anyone have one they aren't using that they'd like to sell us? I'd love to hear from you before we attempt to go on vacation. Thanks, Nancy nelig@aol.com