As far as I know, all Assist Straps, even ones that are/were sold at
the dealers in the past 20+ years or so have been made by VW do Brazil
for their Brazil, Mexico & South African production and parts
replacements.  Haven't seen an OE German one in decades.  I use these
on my 84 Westy and they handle my rather bulky (220+lb) weight when
being used - replaced them about 12 years ago because they were
missing when I got it.  Yeah, a bit stretchy, but no breaky.....

http://www.airheadparts.com/vintage-vw-parts/assist-strap/assist-strap-black-pair-113857611-e-bkpr

My 84 GL still has the OG straps in like new condition.
-- 
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
72 411 Station Wagon "Pug"
75 914 1.8 "Nancy"
Full Timing Since March 1999
oldvolkshome@gmail.com
http://www.oldvolkshome.com
***********************************
On Sat, Jul 16, 2011 at 11:15 AM, Vanagon <camping.elliott@gmail.com> wrote:
> The OEM grab loop inside my '84's sliding door finally came apart last year. I replaced it with one I found online somewhere. Unlike the OEM loop, which had a core of what looked like cotton cord, the replacement has no such core and it's stretchy. It parted this morning, nearly sending me tumbling, so I need to find a proper one to replace it. Who sells the good ones?
>
> Sent from my smartphone with tiny screen & even tinier keypad.