Hi jockm
You will not find a marriage cert for marriages that long ago, certification did not begin in Scotland untill 1855, and for the next few years is rather sketchy. Have you looked at the Old Parish Record for the marriage, if you have the date and place Scotlands People should have a copy of it(unless the record has been lost)
Kinchyle is the family estate for the McBean/Bain family, but they are spread out all over Inverness-shire, especially Badenoch, you could try looking for them in Dores, Duthil, Alvie, Petty or Daviot. These seem to be the main areas of settlement.