The Shure A81WS windscreens will fit mics roughly 20mm in diameter, give or take a couple mm. The C1000S are ~34mm in diameter, so I don't think the A81WS will fit properly.
Curious to see what w/s people are using for the C1000S, as I don't know what'll fit!
Given you're in a hurry, Kindguy has a good point - if you can't get proper fitted w/s by Thu, buy some cheapo screens to put over the stock screens. I did this once and it worked alright. Not perfect, but it was pretty effective til I picked up some proper w/s.