Gorilla lug nuts are high quality and they have every size and length imaginable. Look at their web site. I've run their black chrome ones on one of my trucks for more than 100,000 miles and they still look and work great.
I would not recommend those, (I think they are Rock Crawler or Pro Comp can't remember). I bought those with my wheels thinking they would match well and had them put on when they did the conversion. 5 of them ceased up and and the studs had to be replaced within less than a year of purchase. Needless to say they are not on the van any more.