My God, how many do you need? I 've got probably 100 of them. What year and manufacture do you need? Alex over at Idaho Motor Pool used to have pallets of them. (I haven't looked to see if he still does)
Mine are collectors, not so much users. (Yes, there is a large collectors value on some of them---military, not civilian) For the most part, the easiest way to tell the difference-if it hasn't been changed- is the lid. If the four "fingers" to grab and twist open the lid are bent straight up, it's civilian. If they are round, it is more than likely military. The date is underneath on the gas cans, on the side of the plastic Spector cans, and next to the lid on the water cans.
If you want a plain ol' fashioned 5 gallon "Jerry can" for actual use, I might have a few. (I don't have any DD'S to let go of.)
I don't have any of the newer Spector fuel cans, and maybe one or two water cans.