Been waiting for these to turn up before posting anything, but they arrived today and the quality is good:
These are both bushes for the stabiliser bar in polyurethane, I came across the company by accident, they do a few Coupe bits including the front engine mount, they are called StrongFlex, coupe bits are here
They are made to measure, unlike the Powerflex ones that you have to adapt (and I was told were not very good anyway once done). Not a bad price, cost was 29,19 Euro for both bushes and shipping to the UK.
I'll let you know what they are like once fitted