I posted a similar question on mk1-forum.net you may find interesting - Front Hydrolastic Displacer.

i will try to post pictures of my fix once I figure out how to upload pictures from my iPad.

Roger, did you take any pix of your repair? 

I"ve got 2 hydro cars.

As per direct emails I did review the pics.
thanks

Mini City was able to provide a cone.
I just installed it into the rubber part of the displacer using a piece of wood and a set of clamps.
I also used red rubber grease to ease the install.
looks good!

looking forward to getting the subframes on and pumping up the hydro system.
hope it all works!

Roger,
Did you get my second pic of the other Hydro parts I have?
Chris

Roger,

I sent you an email with a pic of what I think you're after but not certain.

Best,

Chris

A displacer has a metal cone/mushroom that is held onto the rubber via a built-in o-ring.
this cone is where the dowel and knuckle are inserted and apply pressure to the rubber displacer.

seems that mine was not seated properly and over time has become distorted.
does anyone have a bad displacer they could part with.  this cone/mushroom could be removed
by pumping air into it and then pulling out the cone.  I do not need the whole unit, just the cone/mushroom.

my cone measures 2” in height.  I understand there may be various heights.
this is for a 66S.

Can anyone tell me how to upload a photo when on an iPad?

Note:  the cone is not the dust cover.  The dust cover slips onto the cone.