Am looking at getting one of these when I get my mac pro so that I can install a blu ray drive but wanted to know 2 things:

1. Where Can I get one of these adaptors ( please see site below to see which adaptor I am reffering to )

SATA Hard Drive Adapter to IDE ATA-100/133 40 Pin Cable

2. What will the throughput be like considering that its sata to ide , still good enough to play back a blu ray movie ? ( as far as I am aware windows is only able to playback blu ray movies using powerdvd ultra or something to that effect ) as os x does not have the relevant things to play back the movies.

Even if I did use windows would it be able to playback the blu ray movies or not ?