I don't know the part # for the exact switch your looking for but here are some others;
http://www.whiteson.org/boxster/mods/switches/
Contact Jeff at Sunset Imports,he can find exactly what your looking for.
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-99' Zenith Blue 5-spd...didn't agree with a center divider on the freeway
-01' S Orient Red Metallic 6-spd...money pit...sold to buy a house 
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