Normally you can find the actual deb packages under http://people.debian.org/~ovek/harmattan/. The package of SyncEvolution 1.3 is not listed (yet). I asked the developer for the new version and hope we'll get it soon. From my understanding v. 1.3 is a freeze of v. 1.2.99.4-2_armel.deb, so if you like you can try that version, it's from 09/06/2012.

As soon as I get a reply from the developer I'll post it here.

Hope that will help you. I also have still v. 1.2.2 running on my N9.

Have a nice evening.