If by "kosher" you mean "no sherry casks" then that will not be "kosher." I would take a bottle though if you can get one.
I heard if it was mixed with 2-3 other ingredients it's what to be soymech on as it's not primaraly sherry?
I left already with one bottle and some cigs, will have someone try to get you one who will be there in a couple hours.
Should have asked my Q here first!
and would have still been there, spend 40 minutes in the shop, looking around and bought some random stuff before snatching the one bottle.
Will hope they remember to get you one and if yes, will send it over to you after yom tov! לילה טוב