Recently got a Dunwich Shalashaska, which I have a picture of below. I need to buy a new bottom plate because the one on it has a textured finish that won't take adhesives very well. I measured the box from top to bottom (where top jacks are to bottom where stomp switches are) and it was 5.75". Width was 4.75 inches. No box I can find seems to match. Anyone know what size box this is?