Rear brake calipers

[luminova11]

Hi

Looking for a little information. Need to completely replace the rear calipers on my 2004 Meriva. However,  none of the calipers I can find have the rubber wheel on the handbrake cable mounting. What are these called as they also need replacing and i cant find them anywhere, or are they not really needed? I've worked on dozens of cars over the last 35 years and have never come across a caliper with these on.

 

Many thanks

[Vauxhall Owners Club]

struggling to visualise the rubber wheel have you got a picture of what it looks like?