I've checked Mouser and they don't have the appropriate values in FKP. In MKP they are all listed as 'AC Pulse, Suppresion" that doesn't sound right for aC coupling does it?
WIMA's are in general smaller than other brands of comperable capacitors.
Isn't the difference between FKP and MKP that the former is film and foil, and the latter is metallized film?