don't know how many of you are into customizing your van but if you are this is the goto source for parts, aside from everything else they make fiberglass gullwing side and back doors that come with all associated hardware needed for install, $2000 for both or $1100 each.
I have a wheelchair lift behind the side doors and will be adding a gullwing door because it looks ultra cool and to keep the rain off me when i'm getting in the van, they have videos and a picture gallery on their website.

https://sites.google.com/site/vancrazycustoms/home

 

You would need to put a rubber flap mounted on the door and van to act as a gutter because the door will direct all of the rain back toward the hinge, dumping it on you, I have looked into this due to a bad place on my sliders track, it jumps, trapping me in the van, it wasn't fun crawling out of the passenger door assembling my chair there on the ground to hop in. There is a guy in Kentucky who has been hanging gullwing doors for vanners, I would love to have the cash to go there and get mine done.

 

rad i could be down for a gull wing