Hein @ DIY Van could probably design a rack for you out of 80/20 - at the very least you could order his mount kit and DIY one - his installs are used mostly for solar arrays but he may be able to design you something for carrying stuff if that's what you want to use it for. It has the potential for being less than an Aluminess rack but it all depends on how much material you end up using. 80/20 is not cheap - nor is aluminum in general hence the cost of anything Al these days. You will find aesthetics, cost, quality, and durability are all related to cost and effort. If you want cheap - it will most likely look cheap - and it probably won't last. I have seen some HEINOUS looking racks on otherwise nice looking vans when people try going cheap. If you don't mind the work truck look, then I guess it doesn't matter - if putting a $200 rack on a $50K van makes sense to ya, go for it. On the other hand.... unless you are a fabricator, you really don't have many options.
I am a dealer for Aluminess - I can attest from experience that they are the Apple Computer of van life - their stuff, while expensive, is without question the highest quality, best looking, and once installed - something you will just never have to worry about . Unlike Apple, everything Aluminess makes is 100% hand made in the USA - that comes with a price.
Ditto for Hein's items - His solar racks and build accessories are 2nd to none , and use USA sourced custom parts. I get constant comments on how awesome the rack looks & how stealthy they are - and the other stuff he sells saves me a lot of time and $.