So I purchased a 2D off of ebay that was listed as a 5x7 2D with a 4x5 reducing back. What I received on the other hand was an 8.5x6.5 2D with a 4x5 back glued into a few frames and then taped into the original back. I have the back all cleaned and back to its original state.

I'm in the process of replacing the ground glass and now am stuck wondering where to get 8.5x6.5 plate holders. I believe this is whole plate size? Am I correct?

I assume these old plate holders were pretty specialized per camera and not easy to come by. So my question is does anyone know of a place to purchase a 8.5x6.5 plate holder or does anyone have dimensions of a holder so I can build one myself?

The camera will be used for wet plate photography, if that makes a difference.

Thanks for the help.