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I think that is generally a bad idea due to the weakened flange. But maybe it'd be alright with such a deep rim. Some Zipp hubs are 18h as well as Fulcrum and some others.
I actually have an 18h Fulcrum Racing 5 hub - free to any forumer who is willing to pay postage. It needs straight pull spokes though and is not light (but with 80mm rim do you even care about weight)?
Edit: weight of that hub is listed here - I've had an eBay alert set up for 18h rims to go with it (which is how I found that SRAM one) but I'm not prepared to invest the cash in straight pull spokes and rim brakes
Or use a 36 hole hub missing every second hole