Yep - as I keep saying (and have no connection with them other than they fixed mine) see
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Also shows the whole assembly. Better than trashing the car if it otherwise works well. For the money a complete swap seems simpler than trying to fix sides ... unless I'm told you have the gear and presses needed to change the bearings which are often corroded in.
I think 405 estates normally have a bit of slant (and maybe toe in) probably for stability ... but if it's gone further you really notice it.
If it helps I had the rear suspension of my 405 turboD estate replaced by this company last summer and all seems well. They'll sell the assembly or it's a hack to near Honiton. Strange place out in the country ... but they do seem to know what they're doing. Cheers.