Howdy from Arkansas!. If you love your X, you'll love this place! Read, read, read the forums!They'll give you all the info to keep you bike purring and a hella lot cheaper the taking it tothe stealer! If you need a question answered, make sure you post it in the right forum.You'll get the right answer faster.
Welcome to the cafe from Moyock, NC. Hitchdoc.com is one company that makes them. I can't think of the others. There have been some that have made their own. I may go that route since I'm too cheap to pay for the ready made set ups...they are usually a few hundred dollars.
We just bought a trailer for my hubbys bike, the company that we got the trailer from sold us a hitch specific for our bike that fits the trailer. Maybe check with the manufacturer of your trailer for hitch recommendation?
We also have a friend with an X that has a Bushtec hitch and cargo trailer.