1:240 (approx) scale figures, accessories, etc?

I'm building a model of a park for an architecture class using an engineering scale of 1"=20', which, if my math is correct, works out to approximately 1:240 scale. I was hoping I could use some N scale train stuff for it, but that's about 1:160 scale. Can anyone suggest anything closer to my scale? It doesn't have to be precise, just close enough to look about right. And I'm a bit pressed for time, so if you know of specific manufacturers or on-line retailers that would help a lot. Thanks.