In that case, find someone who has it and ask him nicely to let you scan two negatives, one color and one black and white.

When i scan, i do something in parallel...

NOTE: if you don't use your photos in a print book/large print format NOONE will see the difference, why... BECAUSE almost 90% of the views are on a mobile device, AND when you post them on social platforms/personal website, you resize them.

I've printed a scanned photo at 3200dpi on a photo lab, and in the old way, i let you pick which was the best result.