Maybe doesn't look retro enough for your tastes, but how about a Condor Tempo? I've got a Condor Pista (essentially the same), and they're very good bikes.
http://www.condorcycles.com/tempo.html
http://www.bikeradar.com/gear/category/bikes/urban/product/tempo-32343
Edit: I've realised it doesn't have rear facing dropouts. But having track-ends and mudguards is a pain if you get a rear wheel puncture.
http://www.condorcycles.com/tempo.html
http://www.bikeradar.com/gear/category/bikes/urban/product/tempo-32343
Edit: I've realised it doesn't have rear facing dropouts. But having track-ends and mudguards is a pain if you get a rear wheel puncture.