Parts suppliers:

MC145436

Autospeed have these at $7-50
http://www.volt.com.au/cgi-bin/browse.cgi?product=1003704809ecomsvr=1234561010

Jaycar have these at the same price $7-50
http://www1.jaycar.com.au/

16F84A

Jaycar have these for $11-95
Futurelec have these for $4-66
http://www.futurlec.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 one left, a double sided board available for $18 plus $2 postage. A nice board.
I've just sold my last two MC145436, the remaining ones I'm keeping for my own projects. 
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
Australia

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