Do standard rectangle USB to Thunderbolt 2 cables exist?
Thunderbolt 2 is an active connector so even though USB is able to be embedded in the data lines, you would need a full thunderbolt chip to establish that link.

Kanex makes amazingly reliable and fairly priced hardware in my experience:

-https://www.amazon.com/Kanex-Thunderbolt-eSATA-plus-Adapter/dp/B00LOLBBQQ

Also, look for used or fire sale full docks, since they are much less expensive now that Thunderbolt3 / USB 4 is the new hotness for adapters and docks - the older ones might be available as people upgrade to the latest.