Pick Up Where You Left Off
Now you can continue MGS3 on your PS3 without having to worry about the Infinity Bandana or Stealth being in your arsenal or not. It is, although, one time investment only and is no longer in production, according to my reckoning. So go get one before it's all dried up!

PS3 Adapter
I does what its meant to do and it does it well. The only problem is that you will never use it again :/ Unless they release a pc driver(that would be nice). If you have a friend who owns a ps3 wait till he/she gets one and borrow theirs. Or buy it and rent it out.