Go to the rebel in the weapons guild (I think that they called him the tactical officer).
He'll say that there are "more warehouses to raid". Take the missions-they are the same as the second mission where you raid the Jabba Warehouse with 7 thugs in it.
You can loot anywhere from 1 to 3 flora, though I did 11 of them and ONLY looted one each time. I think that it's supposed to be random.
Sorry, the PA tasked me to collect the resource since I'm the master CH, so they aren't for sale! LOL