That'd be Larner engines, others would be Colin at Cam Automotive in Seaford (
not to be confused with the 'other' small Ford specialist in Seaford) or Steve at Lotus Marques (formerly The Elan Factory) in Boronia. Steve would be good for suppling OEM style parts for a road car type engine build if you need valves/springs/buckets/shims etc.
SFE