Hoping someone here could direct me as to where I might find an extended smoke box for one of the NWSL Spartan Series On3 models. I'm mainly an HOn3 modeler, but got a great deal on both a 4-4-0 and a 2-6-0 but need an extended smokebox for one (or both). The models originally included these parts in the box, but alas, both of my models did not come in boxes...