What if I want one of those big ones that used to adorn the city ticket offices of yesteryear?

Is there a well-known online dealer of those?
I remember someone on FT a few years back had a UA 747 in pretty good condition and was wondering what to do with it. (Or how to fix it up??) My own holy grail would be a TWA L1011 since that was what I flew my first international trips on.
And yeah, I'm guessing these puppies would cost a couple grand in good shape...especially for a rare or iconic airline/type.