Haven't ever seen anything available pre-built but you could wire up a relay to provide the needed power/ground momentarily when the lights are activated. Probably not a novice DIY job but definitely doable and for little expense. The same thing can be done to disable the DSC.

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2008 ///M5 - Black Sapphire Metallic/Black Perforated Merino/Madeiro Walnut trim/6-spd Manual
2005 X5 4.8is - LeMans Blue/Black Nappa/Anthracite trim | born 05/20/05 - For Sale
2003 ///M5 - LeMans Blue/Black Interior/Aluminum trim/6-spd Manual - retired
2002 525i - Jet Black/Black Sport/5-spd Manual - retired
2002 X5 3.0i - Sterling Gray Metallic/Tan Leather Sport/5-spd Manual - retired