The normal conversion is to genuine Auster heel brakes for the RHS.An engineer friend of mine is doing such a conversion at the moment.New parts are still obtainable with some difficulty if you can get hold of the guy who still holds the spares.Not an easy job apparently.As for Cessna style toe brakes I have never come across any in my fairly extensive experience of Austers.Good luck they are not a particularly nice tailwheel trainer if that is what you were thinking of.Regards Stampe.