Yep, they're the ones. ECS also do a full collar kit like the Tyrol, as do 034 Motorsport. Both on Awesome's site.
People have mixed results with the £16 option.
The problem is the bolts stretch over time, so tends to be a temporary fix but that is where the Tyrol kit comes in. It comes with ARP bolts that don't stretch. Exceptional quality too, hence the price. Do it once, do it right is my advice......but I appreciate it's a lot of money for a few bolts and some brass collars.