Ok, I hope this does not violate forum rules being this is regarding a scanner.
I know this is a long shot, but I have a Sprintscan 45i that appears to never been used, but missing the film carriers. Looking to see if someone has any of these or a parts machine they might be willing to sell. I believe the holders from the prior version, 45 and maybe the 45 ultra would work. I need the 4x5 carrier and I believe the inserts for 6x7 and 6x6.