I've pondered a similar problem with my medium format Mamiya 7 camera and its 35mm panoramic adapter. It yields about a 64mm long  x 23mm wide panoramic strip on 35mm film without frame breaks.

 I kind of wonder if the Nikon 35mm film scanners might provide enough overlap of standard frames so one might at least be able to stitch several together in Photoshop.

   I don't believe my Nikon 5000 film scanner has frame breaks on the film holder, but I'm not certain how much length it is capable of taking in on a single full magnification scan frame. I think it scans an entire 6 frame segment of 35mm at once during preview mode.  I'll have to do some experimenting and let you know.

I can swear there ain't no heaven but I pray there ain't no hell. _ Blood Sweat & Tears

Not great news. I scanned a five segment 35mm strip and here is what a single frame covered.  I believe this is the maximum area that the scanner can cover in a single scan. It does cover slightly more than a single 35mm frame, but there would be problems in trying to overlap parts of a single long strip because the scanner feeds the entire strip in and then automatically divides it into 37x25 segments.  There is an off-set adjustment in the scanner software that could provide some overlap but it seems to me that it would likely be a tedious process to use for our purposes.

This one measured 37.75mm in length by 25.05mm in width.

I think the scanner preview process just runs each segment in turn over the optics/sensor. It runs the low res scans so fast that it appears to scan the entire film strip at once. Maybe Colman can figure out something.

  I do know that I can scan an 12 frames of 35mm without segmenting on my old Epson 3200 flat bed.  I suspect the V700/750, as well as the V500, can do the same with better resolution.

I can swear there ain't no heaven but I pray there ain't no hell. _ Blood Sweat & Tears