Found suppliers of various parts in
Australia for anyone interested.
Jaycar..... (C6) 470n/400 cap (630v in this case) RG-5247
Farnell..... (C3 and C7) 0.1uF/63V electrolytic order code 9452729
Hall sensor (Allegro) A3240EUA-T order code 1141949 (used these before with other ignition systems I've built)
Oatley Electronics ..... Surplus fluro inverters for ferrite trigger transformer ($4.00) part No. CFLINV
Also small magnets 3 x 1.5 .....part No. G58 ($0.25)
(use these before also and they work ok... leave about 2-3mm gap between magnet and sensor)
All other parts from Futurlec (on-line
http://www.futurlec.com.au/Components.jsp )
I have not at this stage wound the trigger coils onto the above transformer bodies. So I do not know if they will work or not however, they seem to be the right size and I will re-post the results.