I was looking at purchasing a 15" ILEX Paragon F9 process lens, but my thought was to make this into a lens for my Toyo 4x5. Am I wasting time and money doing so? I found quite a bit about other sizes but not the 15" and wondering which shutter it may fit in. My guess is a ILEX #3, which I would need to come up with. Are there other shutters this will fit in that may be easier to put my hands on?

It's not listed in Kerry Thalmann's test sheet, nor Michael K. Davis sheets. I also just checked S.K.Grimes with no luck.