I took a towbar off my GT Sport which I'm going to advertise as soon as I get to 25 posts! It is not detachable but you do not have to cut or replace any bit of the bumper. I think it is called a swan neck? You can unbolt it and leave a little bit of bracket showing.
I'm needing a bumper strengthener bar. Part no 1 on the ETKA sheet above (which you will be removing for the tow bar) so a deal for a swap and £40 + postage my way is here if you're interested.
Here's a couple of pics
Undo two bolts and it is like this.
I just tucked the electrics up and cable tied them in a poly bag.