I just got a used one of ebay then added a new cap and rotor and plug wires. I think a new one with wires for $140 doesn't sound too bad though.
Yeah I really got lucky on my setup, just found a person swapping to a big block and offered him cash for the intake, carb and air cleaner.
I would keep an eye out on ebay, there's normally alot of good parts for cheap.
Heres what you really need.
http://cgi.ebay.com/ebaymotors/Parts...1%7C240%3A1318