Parts suppliers:

MC145436

Futurlec have these

Jaycar have these for $7-50
http://www1.jaycar.com.au/

4066
Jaycar have these for $0.96

CA3140
Jaycar have these for $2-85


NE567
Jaycar have these for $2-60

PIC 16F628A
Futurelec have these for $4-26
http://www.futurlec.com.au

General resistors and capacitors I find that Rockby are usually very good.
They sometimes have some good specials on tantalum capacitors.
Their web address is: http://www.rockby.com.au

Source of boards
I have a small stock. The double sided board available for $15 plus $2 postage (Australia) $7 overseas. A nice board.
I have small stocks of PIC16F628A and MC145436. 
I'm willing to program a PIC for you if you send me one plus enough to buy a protective envelope and post it back to you.
My address:
John F Drew
34 Aitken Street
Millicent 5280
South Australia
Australia

The above list is not all inclusive - just starting points.