Please take a look at the new 1st Gear/W.Britain figures for the assault on Hougoumont. These are some of the light troops and they are in the style of uniforms I think you are looking for. There will be more coming including line infantry, grenadiers, ect.
I suppose the problem is that many great Victorian paintings generally show the earlier uniforms. I suppose this might be that they had access to the Otto Manuscript or the plates by Aaron Martinet, and although they are a primary resource...they are not really representative of the 100 days army. The Vernet plates are the ones that I generally refer to as this covers the 1812 uniform. With that stated, I also trust Dennis Deighton's paintings and drawings and he often shows a mix, or some earlier details like old pattern shako plates, but used without cords and tassels and the newer worsted tuft rather than a feather plume. I am pretty sure that some of this would be correct.
To add to that I am sure that during the 100 days there was a strange assembly of uniforms!
For your information, I might also note that when a Paul Hermans shop earlier this year we put some of our new prototypes in among some of the K&C French he stocked to see how they mixed. In general I think that many of the K&C Napoleonics I looked at were a chunky 1/32 rather than a true 1/30, and the most noteworthy difference was that the K&C heads and shakos were larger. I have looked at many surviving French shakos from this period and even handled a couple in private collections, so this is why I sculpted the proportion and size that appears on the new W.Britain figures.
I hope this might help...Ken