You replace the front EXHAUST manifold for a PLOG, we're talking about the lower INTAKE manifold here, they are two completely different things. I guess you could change the gasket yourself if you have enough skills. I personally wouldn't do it, I don't have the time and disposition to do that much work on my own.
They sell MAF cleaner spray at autoparts stores or you can use electrical connector cleaner.
The recall was for fire hazard I think.