You have two options. The first being the Stereo BBG 21mm:
If you require full wind protection:
Description:Stereo Windshield WS AF Single Shank Kit
Web link: www.rycote.com/products/080205
UK List Price: £295.00 exc. VAT each
This will protect the whole body of the microphone against wind and prevent unwanted rumble & wind noise being transferred up through the exposed body.