No tailgate chains- then what?

[SeanPaintsFlames]

I got one of those hidden tailgate latch sets from Brothers. (these) Now that I can cut those two rusted metal messes off the back of my truck, how do I keep the tailgate up when its open? Are newer-styled cables usually used, or what? If there was a sprung coil of wire sort of thing that would tuck somewhere and recoil itself when closed, but then pull out and hold the tailgate when open, that would be awesome. Much like an extension cord reel like this.