Our board is occasionally graced with odd projects to share with the community...
Yakima Racks US does not have a great solution for GX trucks today - but Yakima Australia does....
If you visit that web site you'll see a model specific, hard mount kit with good weight capacity from three sets of mounting points. Use their vehicle finder for Toyota / Land Cruiser / Prado 3 bar 5 door
www.yakima.com.au
So I bought two products from Roof Racks Galore (an online dealer from the Yakima.com.au dealer locator)
Yakima Lock n load Roof Rack Leg Pack Of 6 8000144
Yakima Lock n Load Fitting Kit for 3 Bar Toyota Prado 150, LC200 8000311
Inclusive of freight (ouch) and GST it totalled to : AUD$365.15 (or about USD$270)
HD Bars or Lock N Load basket can be purchased here in the the US.
Install steps:
1 - remove flush rails
2 - open, follow instructions for the Prado fitting kit - 2 screws in each of six mount locations. Note each pad has a specific location.
3 - attach the leg packs (unlock to mount)
4 - attach support system for bars or lock n load platform
End result can be something like this (I like it and pretty close to roof):
Jake McCurdy is running similar system with Aussie towers.
Let me know if you have any further questions or would like more images.
Yakima Racks US does not have a great solution for GX trucks today - but Yakima Australia does....
If you visit that web site you'll see a model specific, hard mount kit with good weight capacity from three sets of mounting points. Use their vehicle finder for Toyota / Land Cruiser / Prado 3 bar 5 door

Yakima - Roof Racks and Accessories To Suit Most Models
Yakima is the world's leading brand of car racks, and now we've landed in Australia with our range of racks, bike racks, cargo trailers and boxes, canoe and kayak racks, ski racks, and more. At Yakima, we believe the outdoors is more fun when shared, take more friends!

So I bought two products from Roof Racks Galore (an online dealer from the Yakima.com.au dealer locator)
Yakima Lock n load Roof Rack Leg Pack Of 6 8000144
Yakima Lock n Load Fitting Kit for 3 Bar Toyota Prado 150, LC200 8000311
Inclusive of freight (ouch) and GST it totalled to : AUD$365.15 (or about USD$270)
HD Bars or Lock N Load basket can be purchased here in the the US.
Install steps:
1 - remove flush rails
2 - open, follow instructions for the Prado fitting kit - 2 screws in each of six mount locations. Note each pad has a specific location.
3 - attach the leg packs (unlock to mount)
4 - attach support system for bars or lock n load platform
End result can be something like this (I like it and pretty close to roof):
Jake McCurdy is running similar system with Aussie towers.
Let me know if you have any further questions or would like more images.