Hi,
I've talked with Nicola Lutzmann about some problems with the bitaeniatus complex.
He said to me that there were no rudis imported to europe the last years (so there are probably not much in the US) .
He has kept some of the real rudis a few years ago. He also says to me that the climate in the habitat of rudis is very cold, they live in such high regions that most of the catchers didn't even look after them. They take the animals which live at the beginning of the mountains. To get such low temperatures he put them in refrigerators for wine bottles!