Difficult to find. Good luck in your quest. I ended up using ratcheting straps to secure my Yakima SST racks. Now I can mount my crossbars to any car. It's very secure, only downside is water will leak into the car, past the weather stripping, if it rains heavily. Posted via the PriusChat mobile app.
See post #6 in this thread for more details. Yakima rack towers on 2012 v? | PriusChat Posted via the PriusChat mobile app.
That's a good idea they also make flat ratcheting straps that are a metal mesh in the clips that grab the inside of the door are flat pressed metal so that the water won't leak through the door I have a set of rails that have this type of attachment built into them they're kind of old but they still make them today and they're pretty stout and they'll take a hundred pounds supposedly I don't believe it but I don't have a hundred pounds to put up there and I have to find them I don't use them very often but they're really cool the way they mount and they're very secure and they don't stand up off the roof creating that air pocket under the round oval square or whatever tubes you have so it eliminates the fairing if anybody cares about that The sliding metal mesh strap is in a plastic sheath and the metal clip that goes where your door gasket goes when you close the door is coated and it is well made pretty thin I never had any leaks. It has t slots in the channel and can take a myriad of attachments other rack attachments can be made to work very easily if desired.
