Hi Chris and thanks for the info.
The "we don't know" comes with dealing will all types of companies, not all, but some. Maybe it is because I am "private" individual.
Anyway, are any of your caps in your 78585 kit available seperately other than the 3 that are (I have the one pictured above)? I would need one for my 2017 Acura RDX sometime in the distant future.
As for the fitting, damn it just dawned on me last night that I can make one on my lathe. I'll do a search to see if they are available, but I'd sooner see what is available from Astro Pneumatic.