For anyone else following along, I found that these guys:

https://www.wfsupplies.co.uk/

( work_force_supplies_ltd on eBay )

- would make me up some custom hoses with properly crimped ends and 1/4 BSP male fittings on each end.

Also, I ordered some manifolds from Ali:

https://www.aliexpress.com/item/4000575811571.html

These are for the inevitable lines required for compressor -> manifold near mill -> multiple air tools near/on mill. I'm leaving the hard line set-up for another day. At that time I'll place manifolds in another couple of places in the workshop with a similar set-up. Also, I plan to use 24V AirTac solenoid valves for simple CNC control of the fogbuster etc.

Alan