Just as a thought I have a set of strap on pads made for kayaks and such on cars without racks. Sold for about $30.00 the set included 2 pads that have webbing to fasten them down and 2 cam type straps for the kayak. This goes through the doors before closing them, or can be fed though a window opening. Just add front and rear tie downs. I'm out of state right now or I would include a pic and the brand.
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Stan
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