it was a dealer option of a Toyota part, it was sold world wide.....
Yup lots of TMS developed parts are sold to other markets. Rav4 spare tire covers for example are one I worked on. Those can be installed anywhere, dealer or port (Long Beach, Portland, etc). Its Toyota, just not something necessarily considered in the base assembly line version and people have discounted it for that.
If I still had access I could have tracked down the dealer instructions with the line drawings to show exactly where these antennas are supposed to go. Maybe I can message someone on Linkedin