Here's one - prices seems to have gone up:
https://www.ebay.co.uk/itm/HEADLIGHT-LEVEL-ADJUSTER-SENSOR-FOR-TOYOTA-PRIUS-TACOMA-LEXUS-RX-ES-MAZDA-RX-8/233783813889?hash=item366e99e701:g:~28AAOSwHHBfoVxF
or not via ebay which is cheaper:
https://www.aliexpress.com/item/33056820011.html?spm=a2g0o.productlist.0.0.723b732ePXl56U&algo_pvid=e6c800fc-d6b2-4afa-ad59-e9f2c8e27d2c&algo_expid=e6c800fc-d6b2-4afa-ad59-e9f2c8e27d2c-1&btsid=0b0a050b16185591281841723e65cb&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
Remember that whilst your vehicle was registered in 2009, it was manufactured in 2008 - hence you need use 2008 when searching for parts.