Occlusion Culling and Transparent Materials

So, I have a situation where I need to use Static Occlusion Culling mixed with Dynamic transparent materials.

My scene is made up of all Unity 5 Standard Shader (Opaque) materials, and I have a baked Occlusion Culling dataset. However, I have added a script to my camera which causes obstructions that come between the player and the camera to change shaders and use the legacy transparent shader until they no longer obstruct the view.

This solution works 99% perfect for me, however my issues is that because my materials are now transparent, I can see things being switched on and off al the time because of the occlusion culling data.

Is there any way around this?

Thanks,

John