Kev,
The rods you describe are Bolognese rods and they are still popular.
Milo, Tubertini, Daiwa, Awa-Shima and Shimano all have them listed in this years catalogue.
Not sure they would be too good for dapping purely because the rings are match style and very small, maybe 3mm diameter on the tip.
However, I guess there is no reason why they could not be used with a monofil running line and then the line from tip to fly the "blow" line.