RekTek is a compatible non-R12 refridgerant http://www.redtek.com/win_12a_faq.html
The upside with R12 systems are they are less leaky then R134. IIRC, the conversion kit is still
available from Volvo for aprox $150. The A/C will be a separate project in itself, gauge set and
a vacuum pump will be need off EBAY. More tools 8)))).
Moto: Buy the right tools, learn to do it once and you can maintain a system for life.