I have 6 traders as shown here:
http://www.angelfire.com/extreme/chipper/TradersMisc1.htm

I'm looking to fill some holes ---- as found here:

http://www.angelfire.com/extreme/chipper/Europe.htm

I would trade 4 of mine for 3 I need or all 6 for 4. I only have those 6 traders (only the one duplicate of each).