I looked up tires for these vehicles, all 2003 models except one.  I
used Tire Rack too look up their recommended tires.  Guess what?  None
of the vehicles requires reinforced tires, not even the VW Eurovan GL.
I tossed in the VW Routan for fun, just because it's a portly pig.

make / model / curb weight lbs / tire size / max tire lbs@psi

Toyota / Sienna / 3933 / 215-55r15 / 1477@44
Honda / Odyssey / 4310 / 225-60r16 / 1874@49
Ford / Windstar / 4290 /  225-60r16 / 1874@49
VW / Eurovan / 4288 / 225-60r16 / 1874@49
VW / Routan / 4620 / 225-65r17 / 1764@44

You can't argue with the facts that these vans are designed to carry
heavy loads with 3-row seating and NONE have reinforced tires.  What
they have are tires of sufficient size and load carrying capacity to
get the job done.  Interesting, no?

--
Chris S.
Disclaimer: "Death and serious injury may occur"