For repairs to a bicycle frame, the framebuilders listed below are the people to talk to. My build queue is several months long so I no longer do repair work.
Gordon Hill of Hillman frames fame. Located in Croydon Victoria. Lugged frames and brazing.
Geoff Duke of g.duke Handmade Bicycles, located in Northcote Victoria. Lugged frames and brazing.
Aluminium repairs; for repairs to aluminium bicycle frames, contact Luke of Fikas Bikes located in Canberra
Carbon fibre repairs; for repairs to carbon-fibre frames, contact Raoul of Leuscher Teknik located in Alphington, Victoria
Titanium repairs; for repairs to titanium, (and steel) frames, contact Luke of Fikas Bikes located in Canberra
Forks; I make certain types of forks as part of an order for a frame, but I don't offer a custom fork for sale on its own. The time and expense to make a one-off custom fork simply makes it unviable. See if SCV (a wholesaler) sells it, then ask your retail bike shop to get it in for you.