Lost the spring, seal and other parts from the end of the plastic air control valve of the aftermarket booster. Only have the plastic end with the filter.
Can anyone suggest a close replacement. Hate to have to buy another complete booster.
A copy of the parts are listed in Mossmotors.com catalogue

 

I put Delphi brake booster in their search engine and nothing came up, if you post an actual link to what you have, that would be much better then making people hunt to what you have.

What spring specifically, if the parts are listed at Moss Motors, then there is usually a part number associated with it, what's the part number, and/or catalogue number ?

EDIT:
Is this what you have, the one with the plastic top, if it is, you may have to buy the whole thing.
There are kits for these, but I don't remember seeing any springs with them.
How did you lose the springs _ why did you take it apart ?

Test fit — Lockheed brake servo – My Jaguar MK2 Restoration (landieman.com)

 

The better the information given ~ The better & more complete the response will be.

 

This must be it here; don't know if the missing bits are in it though. eg, the spring...

E- TYPE JAGUAR XKE 4.2 BRAKE SERVO REPAIR KIT DELPHI SSB 1068 | eBay

 

Really appreciate the effort to find these parts? I’m kind of illiterate on line. JeffR1 found the exact Delphi part on e-bay.
Have to learn more about ‘Go Advanced’
Thanks Again.

 

You "Go Advanced" if you wish to add a picture, attachment etc from your device like your computer or a URL etc. to a message you want to post. Play with the function on a dummy message that you don't have to post or "Submit Reply"

 

For Australians if you are looking at a replacement brake booster for the old Lockheed booster, I recommend the PBR VH40 brake booster
They are Australian made, much cheaper than overhauling the original Lockheed booster and will last longer.
They are readily obtainable at any major automotive outlet such as REPCO, AUTOBARN, etc.