nothing available for the Jeep 5.7 WK.
here is one dude but tried SRT* headers. I dont know if he ever got this beast running. Thread just ends at install. And you can tell it was no plug/n/play.
Altermnatively, you could go with some SRT8 stock manifolds, they are usually cheap, and they are true short tube headers. I think the ports are different but not that much to matter as you can see in the above thread.
Also, lots of 5.7 goodies, cams, heads, tunes, here: