The converters are discontinued from Radio Shack - the part number has even been deleted from their database.

EVen if you source the converter, you ytill need the correct cables - the converter is only 1/3 of the kit. The cables are custom-made for the BMW. If you do source the converter yourself, I can offer the cables or offer the DSP kit alltogether. I have the DSP kits in stock, ready to ship.

In the meantime, Dension is working on their own DSP modules to still support DSP models.