... which have a very high rim depth (about fourty mm) and that weigh under 500g (that's the absolute highest weight!!!I'd prefer some more light weighted) with not so much holes (would like 16 holes for front and 24 for rear wheel)
I have a lot of problems of getting a lightweight aero rim with less than 28 holes, but I want to build up a real aero wheel set! Only found SUN rims but they are too heavy and my dealer said that they're not very stiff.

PS: After I'm not able to get the AC 420 rims, I have to look for alternative rims

Thanks for your help

Why do you insist on aluminium rims? Don`t you trust the carbon stuff?

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Pinarello Galileo 7,0 kg
Canyon Speedmax 3 8,0 kg (ok for a tri bike...)

I surely trust in it, but when I want to have carbon rims my wheel set becomes really expensive (for example the "cheap" Corima Aero rim costs 242 Euro, that would mean that the whole wheel set would cost nearly 900 Euro with tune hubs and Sapim spokes=> too expensive!).