[Paddlewise] Car topping -- bow/stern tie-down

Our boats presently go atop our car on a Yakima rack (with Mako
saddles), and each is secured with a pair of Yakima's nicely made, very
convenient, if slightly pricey Yakima Bow/Stern Tiedowns.  This works
quite well on our late 80s Honda, as it has two metal loops behind each
bumper, on the car's underside, each being roughly behind the
headlights/taillights.  Not only is it easy to hook the brass snap-hooks
of the Yakima tiedows to these metal loops, but their position is almost
ideal in that the Tiedowns come straight down off the bow/stern without
almost zero deflection from vertical.

But, all good things must come to an end.  The Honda is getting up there
in years, and too many miles and too many Northeast winters have taken
their toll on body and engine alike.  It's time to look for another
vehicle, be it new or (late model) used.

So here's my question:
 "Where the heck do you tie your bow and stern down to on newer vehicles
  (say vehicles manufactured in the last 4 or 5 years)?"

We're looking at wagons and car-based SUVs primarily (**).  Most current
generation vehicles, these classes included, have only one, or at best
two, of the undercarriage metal loops.  I assume these are really there
for tie-down during shipping, and typically are configured
one-in-the-front / one-in-the-rear / each on opposite sides of the
vehicle.  The convenient tie-down mechanism of days gone by seems to
have largely vanished.  Heck, even when looking at REAL SUVs (gotta use
caps when talking about the genuine article), don't routinely have
four-corner underside loops for tying things down.

So, to be more specific, how do people here in PaddleWise tie down their
boats bow and stern when car-topping them on newer autos?  I'm really
interested in A) how to do it conveniently, and B) how to do it in a
manner that doesn't wind up putting excessive sideways force on the
boats that will tend to pull them away from the saddles.

Any help and advice, except for make the Honda last a little longer
(can't do that, though I wish I could), is greatly appreciated.

** - Before you crucify me for looking at an SUV, things that largely
deserve the contempt they receive, let me say that the car-based
models (e.g., the Honda Pilot and Toyota Highlander) mitigate many of
the problems inherent to SUVs that make them target of widespread
complaints.
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