Nativitimer has two bracelets, one for Montbrillant and one for the other Navitimers. My Montbrillant Rep uses a 22/20 bracelet number 443A. The 448A is a 20/18. Neither will fit your Avenger.I'm looking forward to this watch! Would the SS bracelet from a Navitimer Montbrillant Datora fit this well? It's 22mm, just wondering if the shape is similar.
http://www.authenticwatches.com/breitling-navitimer-bracelet-448a.html#.WXSbMITyvAU
http://www.authenticwatches.com/breitling-navitimer-chrono-matic-bracelet-433a.html#.WXSbgYTyvAW