.50 Caliber Seneca Dragon Claw

Have a brand new Seneca Dragon Claw. This is my first PCP rifle ever and I'm having some trouble locating certain accessories. For instance I have some pellets that, besides being 12.7mm round, i.e. .50 caliber they have 5 BBs adhering to them in the same pattern as the 5 side of a die, so I need a container that would have separators to keep each pellet from fowling the other pellets(would like to keep the BBs from being stripped of before firing). I can't even find containers for my regular .50 lead pellets, which I could use anything for them, might even try making my own from leather, but I don't mind paying for them, if someone already has them for sale. Any assistance would be greatly appreciated.