towbar

Hi, I own a 2018 Sportage - GT Line and I'm looking for a towbar. The car is a lease car. I have had it OKd by the lease company to have one fit, as long as it's done correctly and by an approved garage. I've found this one in the link below, but seems a lot cheaper than what I've been quoted...

Hello, I am going to install a towbar on my new Stonic but i cant figure out how to remove the rear bumper. I have removed all the obvious clips and screws but it is stuck somehow on the outer sides. Anyone know how tto get it loose or where to find a manual for this? Thanks!