With the recent release of the Carson City, NV engine, the yellow color with blue striping and lettering got me thinking of another department that utilizes a similar color scheme...Freeport Maine.
First, here is Freeport Engine 1, a 2001 Pierce Dash 2000/750. Based on what I can see it this photo, it looks as if Code 3 could easily replicate this model with existing tooling. I think the color scheme and unique features would help sell it, plus we haven't seen anything from Maine yet.
http://www.massfiretrucks.com/Freeport_Engine_1.jpgNext is Freeport Engine 5's 2009 Pierce Quantum PUC 1500/710/40A, while I understand TWH makes what Pierce and Seagrave want them to make, I think this would make a beautiful piece even though we will likely never see it.
http://www.massfiretrucks.com/Freeport_Engine_5rs.jpg