Daniel,
You said all time on a duchy. is that's true wou'll need to do a 58/Travelair endorsement before you can leagally fly one??
Hempels Aviation out of Archerfield have a baron that they hire i think (they do endorsements in it) There a flying school. Just so you know though i'm not actually recommending you do your endorsement there. I did my IFR there but the shelia i was training with has left and can't vouch for other instructors competance.
Hempels is very well priced though.
Tailwinds
FNQ