Due to the limitations of search on the forum software, I can't find a whole lot of info about booking WT+ (T-class) fares.

I'm using ExpertFlyer now to spec out my itinerary and see some segments that show L0 T2 as availability. When booking a LONEx, does anyone know whether that's directly bookable if I pay the fee for the WT+ cabin? Or does it have to book in to L-class inventory, THEN buy-up to the T-class inventory?

Thanks for your help!