Good luck trying to find one...most of the collectors picked them up within a few weeks of them coming out as with the backdraft firehouse set. Try this link:
http://www.readyshopgo.com/areas/pthinc/hobby1.cfm its past time hobbies a company that does alot of work with code 3. The other thing you can do is a google search of code 3 and see what you get. Be prepaired to pay alot i think the firehouses brand new were going for $300 or $400.
The above comments are mine alone and do not reflect any fire company or rescue squad I am or have been associated with.
Chris Woods