This, supplier and products, for hose clamps that would be suitable for fuel lines etc
https://hcl-clamping.co.uk/Two immediately are of interest. The "Ear (pinch) type in stainless, crimped by that "Ear" section to secure.
Also the "Spring" type that you hold open to slide onto hoe, then release to clamp the item.
Both of these are used extensively on contemporary German cars, with very slim form, secure and of considerable capacity on fuel/water/lubricant lines that aren't handling significantly raised pressures. They are highly reliable and don't crush the hose materials locally to compromise them.
Typical use also for water hoses, if anyone should be working on their NC30 perhaps
