You'll pay a big premium for a 6speed. If you just went with a 5speed, you could get the price way down on the swap.
Here is a good deal I found on ebay:
eBay Motors: JDM Toyota Levin AE111 Corolla 4A-GE A/T Engine Set (item 120193253842 end time Dec-11-07 19:00:00 PST)
You'd still need to get a transmission since this one is automatic. They are located in the SE, so shipping would be reasonable.
You'll also want to check your local importers. Sometimes they don't even know what this motor is and just want to get rid of them. Locally, in most areas, not too many people come looking for these motors.