Unfortunately there are many similar systems in use:
Quickchange, Quick Changer, Quickload, Readyload...
What i'm searching for is comparable to the well known Grafmatic Holder, but the QuickChange System has interchangeable cartridges containing 8 (4x5) sheet film septums instead of 6 build in (Grafmatic).
See some pictures
here or just google: "fuji quick change"