Last month I took a Daguerreotype workshop from Jason Motamedi and he brought along several mid-20th century Linhof 4x5 dryplate holders with spring-loaded pressure plates and a neat ejection lever. I'm wondering if Linhof made these in other sizes, specifically 5x7, whole-plate, and quarter-plate. Anyone know and/or have one in any size they would be willing to part with?