Octavia 2 vrs estate bump stops

Help ... I'm looking for a bit of advice, whilst trying to change the rear discs in my Octy 2.

I noticed something that didn't look quite right, closer inspection revealed the lack of bump stops. ( rotted away)

As the car has been lowered and sits on spax coil overs, i thought powerflex would be the answer, anyhow i ordered the bits and give the company there due they have supplied the correct bits for the car, but they look far to long. Has anyone else had the same problem and if so how did you get round it. Thought I would ask as the car has been up and down on the jack more times.....due to finding the right spline tool to take the calipers off (discs not changed yet) but that's another story for another time.....thank you to all the people who gave advice over removing the rear discs much appreciated and those who advised I'd posted in the wrong place - sorry.....