The supplier that I mentioned to Derek of 1.5 mm diam Boxwood tree nails was Floataboat in Ringwood Victoria Australia I haven,t seen the nails myself but I hear that they are 7mm long and measure 2.2mm at the head apparently $7.00 a pack of 50.
I have also found a draw plate with multiple diameters from the States made by Byrnes Model Machines, I bought one of their 4" saws and am very happy with it's quality.