Warbird Information Exchange

I'm currently finalizing a deal to purchase some spare ball turret parts from a contact with the Pima Air Museum for my project. One of the items is a spare set of external ammo cans used on later models of the ball turret (A-2B model). These are the type that hang above the hanger tubing support structure and feed the ammo directly into the ball turret. I was curious if anybody out there knows where I can obtain a set of internal ammo cans for the ball turret? These are the half-moon shaped stainless steel cans that were located inside the turret (one in front of the other) just in front of the hydraulic units and hand control unit.

If anybody can help me out with this search or point me in the right direction I'd be much obliged!!!

John