For anyone interested, here's a photo of the Canton Ergo 100DC crossover (didn't want to take it, so I tried to capture the ID numbers separately)

By looking at the components, I find it rather hard, economically speaking to replace the red CAPS, those are Electrolytic 6440 = 470µF x3, going MKT would cost more than the speakers themselves and would require a separate chamber. Also these 3 capacitors, I'm guessing soldered in parallel, are mostly used a subsonic filter, the so called DC technology used by canton.
The black Cap is 1664 = 100µF/35vac, also electrolytic (not sure what exactly, but this could be changed for MKT).
The white square (I guess one going to the tweeter) cap is 2856 = 4.7µF/100v - MKT foil, probably no need to change that.
If I were to change anything, probably check ESR for each and try to get the best Electrolytic CAPs available, but I doubt I'd get the factory quality.
The 6700 coil is massive and I haven't seen the values in the list. Also no specs for the smaller 6590 (although there's a 6591 in the list).
All in all the Crossover of the Ergo 100DC is quite different from what I've seen in this thread, although the speakers are quite similar to the Ergo R-CL and all the Ergo Series.