To let others know - the availability of rear suspension bushes for this model in the UK is apparently zero.
My daughter's 2003 Charade has been scrapped because we couldn't get any axle bushes anywhere. The car was otherwise quite serviceable and the bushes were the only reason it failed a recent MOT.
There's a chance that some polybush suppliers could provide parts, but you need to measure up the bush holes in the rear axle and go through their parts catalogues.
It looks like a lot of decent motors could be scrapped for the want of a few quids worth of rubber bushes.