I'll try and give a courteous helpful reply

http://www.greatplainselectronics.com/search.asp?pg=1&stext=74HCT240N&sprice=&stype=&scat=

ED is great to deal with.  I stock up on just about everything component wise from him.

I don't think Jaycar stocks it locally.  Try HOMEPIN on here, if Mike's in the country he has heaps of pinball related components too.