Breather membrane.

I've an extension being added to existing workshop. The existing roof is open up to the rafters and membrane. It's got Iko rubersheild-light membrane which is white on both sides.

On the new extension I'm planning to reuse some plastic clear tiles - with white membrane underneath to match.. and the daylight passes through both the tiles and membrane to act like a skylight.

Only problem is now I can't seem to find any white breather membrane, Iko said they stopped making it.

Anyone have any thoughts on where I can find breather membrane thats white on both sides?

https://www.burtonroofing.co.uk/tyvek-supro-felt-50m-x-1-5m.html

You might find it cheaper elsewhere.

Thanks. Thats the closest I could find. But it is light grey. It might have to do unless anyone else can find a white version ?

Once it is on it will let light through. (I use it often)