Looking for a 16” foil box

I want to replace a foil box on a DW board, but would like a long one like on the FFB Dagger. Is it possible to buy one of that style? In addition to more placement options, it seems like the bigger size would spread the loads more effectively.

Chinook Foil Box (Set of 2) – Chinook Sailing Products

Thanks, I was hoping for a full box as I’ve never installed individual tracks but maybe I should suck it up.