I don't know of an aftermarket filter element that will fit your Durex Moraine filter body.
I see the filter elements on ebay occationally.
Also, search
http://collectorsautosupply.com/> Select an automobile brands
> Choose "All years" for the year
> Choose "Filters" for the section
You may need to search a number of automobile brands.
I have a .pdf pattern to cut a cork gasket for use between the body and the bowl. If you want it, send me a PM with your email address.