After hunting for a while, I finally found this roof rack for my '18 IS300 F Sport, thanks to u/edwinwmartinez : r/LexusIS
Amazon.com: MotorFansClub Roof Racks Cross Bars Fit for Lexus NX NX200 NX200t NX300H NX300 2015 2016 2017 Baggage Luggage Racks Rail Lockable (2 PCS) : Automotive
Lexus GX460 Slimline II Roof Rack Kit
Amazon.com: Snailfly Upgraded Customized Crossbars Fit for Lexus RX RX350 RX350L RX450h RX450hL 2016-2022 Roof Rack Cross Bars Cargo Carrier : Automotive
For Lexus IS 200 250 300 Car Roof Rack Cross Bar Aluminum Luggage Kayak Carrier | eBay
Lexus IS Outfitted with the Yakima Baseline Jetstream Roof Rack Crossbars - YouTube
Lexus GX470 Roof Rack | 2003-2009 Lexus GX470 | Sherpa Equipment Co
Lexus IS 250 Thule Rapid Traverse SILVER AeroBlade Base Roof Rack '06-'13* by Rack Outfitters - YouTube
Lexus NX200T NX300H NX300 (2015-2018) OEM Genuine Roof Rack CROSS BARS | eBay
Lexus NX with Thule AeroBlade Edge Roof Rack Crossbars - YouTube
Lexus NX with Thule AeroBlade EDGE Roof Rack Crossbars - YouTube
Amazon.com: Roof Rack Cross Bars for Lexus NX 2015-2021 Aluminum Cross Bar Replacement for Rooftop Cargo Carrier Bag Luggage Kayak Canoe Bike Snowboard Skiboard : Automotive
Lexus RC F Bike Rack - 3 Years Later - SeaSucker Down Under
Lexus LC500 Roof Rack - SeaSucker Down Under
Roof Racks - Cross Bar Set - Lexus UX – Melbourne City Lexus Shop
For Lexus IS 200 300 350 48" Car Top Roof Rack Cross Bar Bicycle Cargo Carrier | eBay
For Lexus GS IS 250 350 44" Roof Rack Cross Bar Aluminum Luggage Cargo Carrier | eBay
GX460 Full Roof Rack – LFD Off Road
Alloy Roof Rack Basket - 6' Length Suited For Lexus GX460 2010+ – 365 Performance Plus
Lexus IS200/IS250/IS300 Roof Racks Sydney
For Lexus IS250 IS350 300 Roof Rack Cross Bar 43.3" Luggage Cargo Kayak Carrier | eBay
The Quandary (2003-2009 Lexus GX470 Roof Rack) 114834 - OK4WD
For Lexus IS 250 300 350 43" Car Top Roof Rack Cross Bars Cargo Kayak Carrier | eBay
GX460 Roof Rack | 2010-2023 Lexus GX460 | Sherpa Equipment Co.
Lexus GX 460/470 Mule Ultra Roof Rack- NO Lightbar Cutout-MU
Prinsu Roof Rack For Lexus LX570 2008-2015 – Off Road Tents
