I had one the other day :)
The buyers at the office I work at managed to convince Cadburys to give us enough for everyone at H/O to have one! Although I gave mine to my fella and only had a tiny bit as im very much a Galaxy girl!
I had to google "Wispa Bar", seems it was never sold in US, though Cadbury does have many candy bars here. It sounds good. I feel as if I am missing a whole food world over there.:(