Looking for a convertible toad less than 3200 pounds

Now we've decided on a Miata MX-5, but the place we were going to have fix it for towing four-down says there are no brackets available from either Remco or Roadmaster. What to do? We were hoping to buy a newer one but would get a 2011 we've seen, but this place tells us there is nothing available for even a 2011. Time is crucial if we're going on our trip in 16 days. Thank you if you can tell us anything to help.