Peugeot Partner Tepee - 2009 Peugeot partner Suspension clunk osf - 89mustang

Hi, We have a Partner Tepee that has a clunk on the osf suspension. It is a heavy sound and can be felt through the pedals, not like anti roll bar link chatter. It happens over lower speed potholes, I think the other creaks and engine drown out the noise at higher speed.

It has had bushes checked, both front shockers and the upper engine mount changed and the problem persists!

I know its french but it's getting annoying now.

Are there any known issues with these cars?

Thanks

Peugeot Partner Tepee - 2009 Peugeot partner Suspension clunk osf - GHSAUNDERS40
Is this the car that runs on the fiat punto chassis? I had a similar problem withy grande punto. It was worse in warm weather. After along battle with fiat it turned out to be the steering box/rack.