You could probably do it in Kontakt, but there would be several samples for that note, velocity layers and round robins to deal with and it would need some advance Kontakt skills. Maybe I did not detect it because I wasnt playing the offending velocity layer sample?? On the odd occasion I have made a kontakt instrument I tuned the samples before mapping them in Kontakt.
Melodyne could be used on the bounced audio track but you would need editor, not the version that comes bundled with Sonar.
You could try contacting Greg at OTS, he is usually ultra helpful.