Need help finding part

Guys, visiting from the renovate forum.

I have some office / board room chairs Im fixing up.

They are in quite good condition but the wood needs some work.
The cap nuts holding them together are missing, bar a couple.
I want to replace them but cant find anything even remotely close.
Ive even seen cabinet maker suppliers & furniture manufacturers that dont have anything similar.

Can anyone help?

Pics attached of part needed

Cheers

Attachment 270303Attachment 270304Attachment 270306Attachment 270305

Will these do?

Hardware for kitchen, furniture, school , Hardware.net.au-Hardware Online

half of these.
M6 FURNITURE JOINT CONNECTOR BOLT & CAP NUT - M4 ALLEN KEY HEAD - SHOP FITTINGS | eBay

or these
Furniture Fixings 1205

and I still don't know what their called.
Peter

This is the closest I've got...which isn't that close really :q

How many are you after? You're welcome to 'em for postage if you want 'em...one less jar of salvaged hardware I'll never use to take up shelf space.

The link to the Elraco website mentioned by DJ's Timber has changed due to a website upgrade and is now at this link. Apologies for any inconvenience.