At least exist ...

It is the only product of its kind that I have found: I had gone to use a plastic bottle, but I opted for the aesthetic and it works: I had problems when it rained, the problems disappeared.
Yet I read everywhere that the rain was not a bp of the LNB reception and were insensitive to rain: a simple test with a water spray showed the opposite (I have a 0.2dB LNB PSI).
So I bought this product and I'm happy.

BUT:
- The plan, fake, will not serve you much, but the assembly is simple (3 plastic parts ...)
- The plastic support is fragile and not allow tightening the screws: with the wind, it goes wrong. I can strengthen it with INOX metal
- Taking just the wind, it is high I had to strengthen my LNB support arm as he moved in all directions with the wind.
- The plastic sheet hides the LNB: I have a 85cm dish, I had to change the assembly to remove the masking (if I had two heads it would be worse).

Honestly the product is expensive for what it is, and I doubt he does fizzle, but it does its job by protecting the entire head, including through when it rains.