The best solution for the two Oktava MK012's:
Description: Stereo Windshield WS AD MS Kit
Order Code: 080202
The Oktava microphones are 105mm long. The recommended length for this windshield is 90mm. This means the microphone will enter the end caps by 15mm. This will not be a problem.
The slot for the XLR's is slightly larger in the Stereo Windshields to allow two cables to fit. (If not opting for a Connbox CB3)