Thule cross bars for RTT

[TheLast13]

I emailed Thule yesterday about what cross Bars I should use with a TJM RTT. I see a #45058 as their HD bars but the rep said it is only rated to 165 lbs.
I like Thule products but TJM said I need bars rated to over 400 lbs.

So what should I do?

I've got a 2012 SR5 with the factory roof rails and OEM crossbars. Which I know won't hold a RTT.