In that article it did state that it is harder on compressors that are made for R-12. How long do you plan on keeping your vehicle? It might be worth the investment for a new compressor if you plan on keeping it. R-12 cannot be produced anymore, but they still is a supply of it. But once it's all gone you'll be forced and the price of R-12 will just get steeper. I'll check on prices for the retrokits tomorrow. You will be able to do the retrokit, but you will need somebody certified to evac the system(create a vacuum) and fill it with new refrigerant.
Bean