This company MAY have them. Not sure for the Z but worth the call.
BMW Parts and BMW Accessories | Bavarian Autosport
The right BMW parts - the best prices - guaranteed. BMW parts are all we do, and we've been doing them since 1974.
2009 BMW Z4 35i/Space Gray Metallic/7 Speed DCT/Premium,Cold Weather & Premium Sound Packages/Nav/Comfort Access/Ash Grain Interior & Dash Kit/AntiTheft/SportWheel/PDC/WindDeflector/Black Kansas Leather/Smoked Reflectors, Side Markers & 3rd Brake Light/Ferrari Red Brake Calipers/Clear Front Mask/Gloss Black Grill Inserts/6000K LED Lighting/De-Badged/Aluminum Pedal Set/Real Carbon Fiber BMW Door Sills/CF Wrapped Engine Compartment Roundels,F Lower Grills & Center Wheel Caps.