How about using paper to mask off a 24x24 box down to 12x24, and then masking off a common 36 x 48 softbox to 12 x 48 inches? Do you have the room to do that with the larger softbox?
Paul C. Buff - Foldable Stripboxescan not seem to find strip lighting sizes 12x24 and 12x48. anyone know who may carry these sizes? thx