https://www.fiatforum.com/panda-classic/136060-rear-bushes-they-available.html, I started the post, and ended getting them direct from Fiat. Took 3 days to come in I think, but when I removed the shocks to change the bushes I found they had also gone, so had the car in the workshop for a further 4 days whalst waiting for my local parts place to order them in, so check they haven't also gone.
Found the thread now, most helpful, cheers one and all, I'm hoping the shocks are in tact, the bushes haven't entirely gone yet but it I imagine they'll give up soon by the look of them.