I've used all of the Proraso creams over the years including all of the Single Blade line. I agree with OP, Single Blade line was the best performing and Azur Lime was the best scent. A few years ago I 3017'nd one of the IV bags OP has in the picture and it was superb. Its a pity we're losing it.
I agree, I have the complete Azure Lime line and it my favorite of the Proraso brand.
I assume the Single Blade line did not hit the sales numbers needed to keep it in production.