I spoke with Mushkin today and asked them about the future of the manufacuter of the BH-5, BH-6, CH-6 etc. chips. They said that Winbond is goint to stop making memory chips altogether. I don't know if they have already stopped or if it's in the near future, but that would lead me to believe that all BH-6, CH-6 chips are going to become more and more rare as time goes on.
I don't understand why they would stop when clearly they had a huge moneymaker in BH-5. Mushkin said that they(winbond) aren't interested in making memory anymore.