So, the non A/C one is still available and is part number 171819415F, however it says the A/C one is not.
If we look at the 85 Cabriolet we find it has a couple different water deflectors for A/C. The earlier one is 155820415 and then later it went to 155820415A. If you punch in the part number, the earlier one has been superceeded to the 155820415A part number. I don't see why that wouldn't work as they are essentially the same car.