Something like this after a quick scan of the specs and directions and hz and resolutions SEEMS like it will work so long as you don't run your 5Ks higher than 120hz. You will however need a displayport coupler since you will end up with 2 male DP ends.
But also, laptops all have this general concern. Many only use the discrete GPU to run the screen and leave external ports being driven by the integrated GPU. If this is the case for your laptop no adapter is going to work b/c your laptop isn't driving the HDMI port with your discrete GPU. I'd look into those details first before spending any $.