Just FYI, it is "spigot", not "spiggot". A spigot is a thin tubular part that fits inside another tube. Changing the spelling may help your searches if you have no luck with all the other suggestions given above.
Ha, thanks. You're right, it's single g on the invoice for the ones I bought. Switching single and double letters is my most typical spelling mistake.
Though, it seems I've been typing it with single g at least sometimes in searches, since trying it again now gets product lists I've seen before. Camera/flash mounting spigots, sigh...
@evb149 Thanks for the links. Lots of informative pics, and the Swagelok catalog is very useful. Especially will be later, when I get to the part of the project that needs stainless microtubing.
But, US manufacturers' stuff is almost entirely imperial, and the rest of the world (me too) prefer to stick to metric where possible.
Btw, my experience with McMaster is they refuse to post overseas. I've yet to try getting stuff from them via an 'assisted purchase' US intermediary, but will try it someday.
Thanks for all the other advice too.
I should clarify - I've been buying small numbers of parts from a local store that's about 5 minutes drive from home. I'm lucky to live near an industrial area with quite a few useful distributors. There I can get any number of the compression sleeves (77c ea) and spigots (87c ea) but since I'm poor and yet like to buy in decent amounts of stock of things, I'm looking for an Aliexpress or ebay-China seller with the usual price ratio of about 1/10th of local prices. So I can buy enough to not have to keep driving to the shops for ones and twos. I hate that.
For eg, a simple 1/4'' BSP Thread 120 PSI Pressure Relief Valve - Au$21 locally, or AU $2.49 (free shipping) from ebay-China.
It's hard to believe such a simple thing isn't made in China for 2c each (or at all, apparently.)
Incidentally, the immediate use is for argon (which is expensive) lines that will get a lot of flexing. Hence using the liner reinforcing spigots. But in general I just like overkill. So it never breaks or leaks.
There are some pretty neat Aliexpress pneumatics stores. For eg
https://fsqd.aliexpress.com/store/511925?spm=2114.10010108.0.0.7FJmAb