Someone said something the other day about one of the suppliers using Porsche 914 or VW calipers and/or discs. I'd really like to know if one can buy the parts separately from a wreckeing yard and do a rear disc conversion like you can with front big brake upgrade. Is there something simple like perhaps just an adapter bracket that is required. It would sure be nice to get rear discs without having to pay a premium price for a kit. Anyone? I know others are after the same info. Thanks.