Shimano disc brake. Spare o-rings, where from??

I’m building my brakes onto a different frame which obviously involves removing the hose/s.
I’d like to fit new o-rings on the caliper ends of the hoses but i can’t find them anywhere on there own ie not part of a £20+ hose kit.
Any ideas??
Ta

I’m not sure why you’d need to remove the hoses? Unless the frame has internal routing.

Or captive routing.

Not sure why you need anything other thanlive and barb, which are available separately

Yes captive routing.
O-rings looked a bit fraid when i removed the hoses,i just want some new ones.

Might be worth trying your LBS, XT hose kits usually come with an extra O-ring that they may have kept for spares.

on there own On THEIR 😉

THESE