FireStarterBobMassdrop does not map boxes and does not work with vendors that do so. Whenever we sell "loose" booster packs, they come directly from sealed booster boxes. We encourage you to come back here and post your loot afterwards to increase the transparency in this process and keep us honest.
(Note that the allocations for this drop are 36 and 72 packs per set; conveniently the number of packs in 1 or 2 booster boxes.)