Hello, I'll be replacing my headgasket over winter using a later metal headgasket. I've done some research and everyone recommends using a copper spray to seal the gasket; specifically 'permatex' copper spray. The issue is that a lot of the threads I'm finding are from a few years ago and the issue is I can't find a UK supplier of any copper gasket spray. It appears due to being an aerosol, no one will ship it anymore. What do people recommend to use now?