The last email I got from Schatztruhein Nov.2003 stated the no longer supported the Guru Rom for either the GVP or A2091 controllers. My guess is anything you get from Software Hut of Mr. Hardware will be remainders. It is unlikely that any more ROMs will ever be produced.
Having said that I bought my A2091 Guru ROM from Software Hut. It was very well package, which is very important when it has to cross the border and clear customs.
An adapter is required for both the GVP and A2091 Controllers, be very careful with pins on the adapter because they are very fragile and cannot be easily be replaced.
Shaf
