DickSmith dosent seem too have a Lm308 or 108. Is there something simiar I
Farnell is in Australia, they accept credit cards, and they have the LM308H and
LM308AH in stock. I believe they take plastic.
Order Code 398433 LM308AH $10.64
Order Code 398470 LM308H $4.94
Digi-Key (a U.S. outfit) has the LM308AN (8-pin DIP pkg), LM308H and LM308AH
(TO-99 can) for $1.75 to $3.60 USD. International orders have a $6.00 USD
surcharge added to the order, plus shipping is somewhat more. They also have a
minimum order restriction.
www.digikey.com
The LM308 is a 1970's vintage op amp, SOTA for its time. Unless you can
provide a schematic, anyone answering your question would probably just be
guessing as to a substitute. It might be worth it (particularly if you're
working off of existing circuit board artwork) to just bite the bullet and
order the thing.
Good Luck.
Chris