I know your question was more focused on motors, but if you are interested
in the whole regulator, Van Cafe has the aftermarket regulators with motor.

http://www.van-cafe.com/home/van/page_1261_622/aftermarket_power_window_regulator_drivers_side.html

Please notice that the description is pretty clear that they feel this part
is a compromise, but I suppose it is the best they can find (gotta love it
when vendors are honest!).

For just a bit less in price, they also offer the motor alone for the stock
regulator, but I think their point may be valid, that the regulator
mechanism is what typically fails and slows down (I had to rebuild one of
my stock regulators, the motor was fine, quite an involved job but also
accomplished with only about $0.05 in parts.)

http://www.van-cafe.com/home/van/page_78_622/window_motor___driver_side.html

Roland

On Mon, Feb 27, 2012 at 7:24 AM, Brent Weide <brent.weide@gmail.com> wrote:

> 1991 Vanagon Multivan
> Has anyone had experience or heard of replacement of the stock vw
> power window motor with another model motor without reworking the
> regulator assembly?  I've been nursing my motors for years and they do
> raise the window.  I'd just like to explore options like being able to
> bolt up a more readily (cheaper) motor that will last longer and turn
> stronger.
>
> Thanks,
> Brent
>
> --
> Brent Weide
> Portland, Oregon
> www.weidefamily.net/vanagon/
>