The 3 X 2 setup now on E-Bay is intake correct only. The carbs are not origional (the OEM outboard carbs were actuated by vacuum motors). OEM intakes seem to go for around five to six hundred dollars. They may be increasing in price as so many are now interested in them.
Finding an origional complete setup is very difficult and if found will be extremely expensive. Just recently, a LINC air cleaner asm. went off on E-BAY for $10,000.00.
Just look at what a fuel pump went off for;
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4524312291
An EDELBROCK intake will accept the older STROMBERG, HOLLY and ROCHESTER 2V carbs. That may save you some money.
1964 LINC restoration and modifications;
http://www.sff.net/people/mckitterick/Lincoln/lincolns1.htm