According to Pascal Q1 is a BDW93C transistor.

You can confirm this by reading the print on the transistor. This number should be printed on there.

If you have no luck finding them or an equivalent at Jaycar you can find them at RS online. Don't forget some diodes as well!

http://au.rs-online.com/web/c/semiconductors/discrete-semiconductors/darlington-transistors/?searchTerm=BDW93C&h=s&sra=oss&redirect-relevancy-data=636F3D3226696E3D4931384E4B6E6F776E41734D504E266C753D656E266D6D3D6D61746368616C6C7061727469616C26706D3D5E5B5C707B4C7D5C707B4E647D2D2C2F255C2E5D2B2426706F3D313326736E3D592673743D4D414E5F504152545F4E554D4245522677633D424F5448267573743D42445739334326