If you go on the castle game thread Vern1 is Petty of Petty Paintball. He's a member here, you could always send him a pm. He's also a member over at SCP and he's very pump friendly so I'm sure that that won't be an issue.
We have several other pumpers like Turbo Chicken that will be there I'm sure that ya'll can work something out. It might be cheaper to split a case 4 ways than buy individual bags.