for most rare poptop parts try www.poptops.com 
they should have both styles of parts. 

I like the ASI straight up style, but the ABS plastic base/top are a little thin and not up to the quality of the fiberglass.
the staight up ones don't have skylights (that i've ever seen)  in the event you want a better vent.

Dan

Subject: Re: Straight-up VS. Tilt-up - the best Westy Top

Go for the straight up (tilt up, in line) hopefully you'll be dealing with a
Westfalia Conversion.
I've never had any other type but I know there might be trouble with finding
replacement seals, hardware, canvas and other possible parts for 'little
known' conversions.

Stan Wilder

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of John Rodgers
Sent: Monday, February 02, 2004 3:07 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Straight-up VS. Tilt-up - the best Westy Top

Just wondering what kind of pop top is considered to be the best and
most trouble free. I have seen the pictures of both, but never having
owned or operated either, in my idle daydeams which should I consider.
The straight-up type appeals, but what are the pluses and minuses of each.