No problem Michael. If you can't get a sheet in time, it will be taken into account during the judging, as it's beyond your immediate control.
It's a good idea to have a sheet of various sized swastikas in your most often used scale, or the sheet I posted, as this is a very common problem.
My current Bf109G-6 build did not have swastikas on the kit decal sheet either, so I had to source the correct size and style from those spare I keep in the decals files.
Even Tamiya are cautious when it comes to this symbol - they included the swastika on their Bf109E kits decal sheet, but it is cut out and removed when exported to most European countries, and even the instruction sheet only shows the decal number and an outlined square where the decal has to be placed !