The input looks similar to a 4 pin DIN, or mini-DIN connector, you might want to try one if you can find it locally to see if it mates up.
Those 4Bar systems are great, but the stand, case, and accessories are super cheap and break really easy, and Chauvet does not sell these items individually (They could probably make a killing selling the cases and stand separately. A local shop I help at rents these items and so far after a year, there are 6 broken stands, every bag for the stand has had the zipper rip off, and 4 "road cases" for the 4bar that the zipper is no longer functional meaning we have to bungee the case together.... Lights still work though).
Apollo lighting just came out with a system that is similar (LS4195), and so far their stuff has been durable, and the cost on this is actually quite close to the 4Bar system, they say it comes in a flight case. (How durable or what they mean by flight case im not sure of).