Fresh clotted cream is extremely difficult to acquire in Canada due to pasteurization laws, however I stumbled across an excellent substitute at a Persian grocery store.
It is called Sarsheer and it is heavenly.
It is sold fresh in the refrigerated section. There is another, similar product called Kaymak, which is slightly lighter and silkier. These are the closest I have found to thick fresh Devonshire cream (I don't care for the little glass jars of preserved Devonshire cream).
If you have a Persian community in you area, I seriously recommend you giving it a try with your next scone!