Planters Allis Chalmers planter plates

[Carlisle]

I have a 2 row AC planter and need some sunflower plates. I'm not sure of the model number but these are individual units mounted on a tool bar and have fiberglass fertilizer hoppers.

I spoke with Lincoln Ag and they make an adaptor for AC planters with 6 7/8 inch plates BUT this one has 7 7/16 inch plates.

Any ideas or help would be much appreciated. Thanks