If you have a look around your area for a car radiator repairer, they de-solder the header tank and the bottom tank, Then they put a new core in between and solder it all up.
Its usually the core that gets blocked, doing it this way you get all the pipe connectors and fittings the same as your original rad.
Shouldnt be more than a new rad and can be cheaper.
There will be a scrap value on the old rad, whatever way you go.
Best of luck with the search.
