figured out a way for less than $200. It takes three items to make the crossbar setup. First, The USA amazon is too expensive. You order from Amazon.com.uk the Thule flush railing kit 184016 (thule 4016) which fits TC from 2014 on. That will fit the silver flush rails. Then you need the footpack and crossbars to go with the 4016 kit. That I went to eBay and purchased a Thule generic setup: https://www.ebay.com/itm/08-Audi-Q5-06-Audi-Q7-16-BMW-X1-Roof-Rack-Cross-Bar-Top-Rail-Cargo-Carrier.
This eBay item is for Audi but will accept genuine Thule parts. I did not use the Ebay Audi flush railing pieces since they will not fit a TC; used the 4016 kit instead, with the eBay Audi footpack and cross rails.
Now on Amazon.com.uk you can order everything you need for the crossrails, but with the money conversion and shipping, that cost is too high. However, you get several options, like square bars, wing type in alum or black, etc. just be mindful, that different type bars take different type footpacks to work.