I've never personally seen one. If it is going to an ethernet port on the same wall (less than a metre) then you can look at one of those Cat5e or Cat6 "flat" Ethernet cables.

like this ?

https://www.pbtech.co.nz/product/SEVOEM9025/Cat6-UDP-RJ45-Cable-Right-angle-to-RJ45--1-Meter

johny99: Yea, but angled down.

Ahh .. so like these ?

https://www.aliexpress.com/item/Down-Angled-90-Degree-8P8C-FTP-STP-UTP-Cat-5e-Male-to-Male-Lan-Ethernet-Network/32663209059.html?spm=2114.search0104.3.27.r8mKpZ&ws_ab_test=searchweb0_0,searchweb201602_2_10152_10065_10151_10068_10344_10345_10342_10343_10340_10341_10307_10060_10155_10154_10056_10055_10054_10059_10536_10534_10533_10532_100031_10099_10338_10103_10102_5590020_10052_10053_10142_10107_10050_10051_10084_10083_5370020_10080_10082_10081_10110_10175_10111_10112_10113_10114_5610015_10312_10313_10314_10078_10079_10073,searchweb201603_24,ppcSwitch_5&btsid=ba76c4d8-c93a-43b9-a5a7-aebd9f963f61&algo_expid=0c67254e-835c-4eff-8daf-8b5c6391d15a-3&algo_pvid=0c67254e-835c-4eff-8daf-8b5c6391d15a

https://www.aliexpress.com/item/0-5m-1m-2m-3m-5m-Elbow-Up-Down-Angled-Cat5e-8P8C-STP-Cat5-RJ45-Lan/32807025822.html?spm=2114.search0104.3.35.r8mKpZ&ws_ab_test=searchweb0_0,searchweb201602_2_10152_10065_10151_10068_10344_10345_10342_10343_10340_10341_10307_10060_10155_10154_10056_10055_10054_10059_10536_10534_10533_10532_100031_10099_10338_10103_10102_5590020_10052_10053_10142_10107_10050_10051_10084_10083_5370020_10080_10082_10081_10110_10175_10111_10112_10113_10114_5610015_10312_10313_10314_10078_10079_10073,searchweb201603_24,ppcSwitch_5&btsid=ba76c4d8-c93a-43b9-a5a7-aebd9f963f61&algo_expid=0c67254e-835c-4eff-8daf-8b5c6391d15a-4&algo_pvid=0c67254e-835c-4eff-8daf-8b5c6391d15a

never seen anything locally 

https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=cat6+angled+straight&rh=i%3Aaps%2Ck%3Acat6+angled+straight
Angled one end, straight other incase this suits better