Don't recall EVER seeing a shop "make" a radiator hose out of rubber.
Are you wanting something in tubing and connectors?
If you want a "regular" hose, make a pattern with a coat hanger, go to the ap store and ask to look thru the hoses.
Find one that fits the pattern, even if other parts of it are unusable. Cut to fit.
We do this very often. We then save the label for the customer, so they can repeat if necessary.