Looking for Thule Hullavator hardware for AeroBlade bars

Hi all,

I am buying used an older Hullavator 897XT kayak lift, but it is only compatible with square bars. Later 897XT kits came with adapters for Thule's AeroBlade bars, which I have. Thule sells the adapter parts individually but they are $52.50 each for the most important parts (part A) and you need two of them, in addition to a few other miscellaneous parts.

If you happen to have purchased an 897XT and have the AeroBlade parts but do not need them, I would greatly appreciate if you'd sell them to me.

Also, if anyone knows of another good place to post this or where I might find the parts at a discount, please feel free to suggest it.

Thanks!