Wow, I didn't know any of that. Maybe if I worked on cars I'd have a clue.
I've replaced many compressors and clutches, never with OEM, and none have been an issue. Also, many "OEM" parts for old cars are rebuilt, not new, and could be coming from the same guy who does them for the parts stores. For the extra money spent you get a Ford box and shorter warrantee. And you're wrong about the "big cost" of replacing a compressor, assuming yours needs to be replaced. If yours "tore up" the bulk of the cost will be cleaning and replacing the parts that became contaminated with compressor shrapnel. Most "failed" Ford compressors I've deal with just needed the clutch adjusted or replaced.