You should be able to get one at any plumbing supply place. Not getting a Chinese part...that might be difficult. Removing the old one? If you can get a good pair of vice grips on there you might try tapping with a hammer to get it moving. Go tighter, first then loose, rock it back and forth. Don't hit it hard, no reason to break it if you don't need to. If you use heat, use LP or MAPPS gas not Oxy/Acetylene. Heat the block not the plug. All else fails, drill it. Start small and work up to larger. Clean the threads with a pipe tap.
