Caliper problem solutions?

[M.C..]

Over the last two trackdays I had had issues with my brakes vibrating when braking from high speed on a track, they stop the car fine.
When I am on the road the brakes are fine no issues at all.

I have had a look at them today and found that the slider pin in the top hole is wobbly (as in the video) if I swap the pins around it is the same hole that is wobbly, so the top hole is knackered, are the sleeves in the carriers replaceable or is it a new carrier job.
I don't want to be buying secondhand ones as I could end up with the same issue with them, and the cost of new ones I may as well put them money towards some 4 pots.

Any suggestions what to do?
http://vid2.photobucket.com/albums/y13/cliomark/Clio 182 Track car/slider pin_zps7btiaufe.mp4

 

[bloke]

you could bore them out and bush them. shouldn't have much problem finding a decent used one.

 

[STEVE.M]

you could bore them out and bush them. shouldn't have much problem finding a decent used one.

Well a decent machine shop could.Good plan.
Are you sure it`s not just the ABS kicking in?If you want to disconnect it,unplug a sensor,DO NOT REMOVE THE FUSE.

 

[M.C..]

Definatly not ABS, it is more like a warped disc feeling through the steering and not in the pedal like ABS.
I did think about machining them out (I'm a toolmaker so have access to VMC's, lathes etc)

 

[Mr R.]

It will be that pin.

Machine it out mate.