Eric,
I desecrated the pop top on my 91 Multivan by removing the stock, noisy roof vent and instead installed a universal fit sunroof which can be opened at the front, back, or elevated to be parallel with the roof surface. 
I enjoy it but it’s not for the vanagon purist. 
I did a write up on my site if you care to have a read. 
Www.weidefamily.net/vanagon
Go to  Body > Sunroof

Best
Brent

Sent from my iPad

> On Feb 4, 2020, at 12:17 PM, Eric Caron <ericcaron96@comcast.net> wrote:
> 
> Hi Alistair and others.
> 
> I’ve been wondering about a few improvements.  And wonder if anyone has created such a thing.
> 
> The first is, I like the sky light for the ventilation but don’t care about the light.  OK, I’m blind so that is pretty understandable.  But I also don’t like that it fails on a regular basis, cracks or leaks.  But, more then that it lets in heat during camping season.
> 
> I’d love a Aluminum replacement that is the same shape and then I just need a screen and no more sun shield fabric falling down, and no more cracked skylight.
> 
> Only improvement would be for a simple up and down latch to replace the weak crank up system.  But I can live with that.
> 
> Of course a improved latch could also make it possible to  open the skylight completely then folks have the option to look at the sky or to reach out and adjust, inspect, or clean things up on the roof.
> 
> My van is on skylight number 3 in 7 years so I’m up for a solid improvement.
> 
> Anything like that out there?
> 
> Is that a reasonable metal fabrication?
> 
> Eric Caron 
> 85 GL Auto