BA Falcon ute window winder broken again

The drivers window winder has broken ..... again!  @#$%$^

HISTORY
It died some years ago.  At that time, Megan's dad perormed surgery on it and that kept it going for about another year.  Then it died again and I purchased a non genuine one over the net.  That died about 13 months later (4-Mar-2012) and the suppliers kindly replaced it.  Now that replacement has died.

OPTIONS
a) Wreckers - but the one I get may be at deaths door.
b) Complain to the original seller
c) Buy another non genuine one.
d) Sell the ute.
e) Dismantle & rebuild the current broken unit.

WHY
The question of course is WHY?
Why do these things keep breaking?
Too much friction between the glass and the track? - I lube it with a teflon spray.
Design flaw that results in too much power being required from the motor?
(Mind you in the orignal unit the gearbox connected between the window motor and the cable drive failed.  In the non genuine one, a plastic pully failed.)

BTW
they seem to call these assemblies "Regulators".
and you have to ensure you are buying a drivers door one.
My google search is "BA Falcon window regulator drivers door"

PURCHASE OPTIONS
Ebay $60
getautoparts    $72.20  ?freight   Wrong type
carsrus.com.au    $46.90 +Freight  Wrong type
express car parts  $76.00 +$12.90 eparcel standard freight. =$88.90  seems ok
nationwideautoparts   $110 Free delivery

"Wrong Type" means does not have pullies at both end of the track.
(See example pictures here) The problem is that all the photos I can find on the suppliers web sites are taken from the wrong side.So I am not sure.  The picture from "Express Car Parts" looks like their unit has pullies.

Ordered one
We wait and see.

Blast.  Same design as the failed one.

New one on left.

Here it is photographed from the other side

Here is the photo I looked at before I purchased. 

The comparison is at the right hand side.

Oh well should have asked but there is just so many hours in a day.