Don't know exactly for 500 K0, I can give example from my 550 K1 (1975), USA model. I investigated details as I did conversion to Europen (lower) handlebars. Only difference between US and EU/UK model is upper hose length due to higher US bars. All fitings are 100% the same.
So, I advice to measure length of your hoses, specify fittings and order them

I advice Goodridge manufacturer - they have hose that is braided (modern, top quality) and looks like stock (but thinner in diameter). They call it "vintage black", you can order custom length and fitments like stock one
If I remember correctly I ordered lower 340mm long, upper 300mm - but you should verify that on your bike
Example of hose set as I got from them from Goodridge
Note: I finally had to remove that rubber grommet from hose (as it did not match fender hook) as on the picture and keep stock one