Rattling Roof 207cc Cabriolet

[u8myufo]

I have searched previous posts but may have missed the answer i`m looking for. With regards to the roof rattling when closed the problem is defo the flat bar in the centre of the back window section which goes into the recess of the solid roof section. If you push up on it inside whilst driving along it stops. Does anybody know if there should be a rubber sleeve that goes over the bar or a rubber insert that goes into the recess at all? I did try wrapping some tape around the bar but it still persists. If there are any rubbers that need to be used does anyone know where to source them from?