Tristan,
I had the ARB bushes replaced on my Stradale a year ago, and (part of) the invoice read like this -
To refit front and rear anti-roll bars, with new spherical joints/links.
To custom-make new front tie-rod bush sleeves and TCA outer joint bush sleeves.
To adapt other make Super-flex bushes for TCA outer joint ends.
To adapt other make Super-flex bushes for tie-rod front mounts and front anti-roll bar mounts
Speak to Mark Nicholson at Italian Race Services near Basildon, Essex on 01268 726279. I'm pretty sure that he modified Ford Escort?
bushes to fit the Abarth.
Cheers
Simon