I realize this thread is a few months old and I don't know if the OP is still considering it, but FWIW here's my RK with the tour pak (also has lower fairings):

 

I needed space for longer distance Adventures on the M8 King. Picked up a Tour-Pak from a 2000 Ultra for $400. Modified the Quick Disconnect mount and made my own wiring harness. Installed new LED bulbs. A bit Old School but it turned out well for my purposes.

 

I'm planning to add a King TP to my RK and am curious if my existing passenger backrest would fit with the TP. It looks like it would be a tight fit at best but am wondering if anyone has tried it. I may forced to get the backrest that mounts on the TP.

Thanks

 

Chopped on a RK looks real good.