In the town of Plano, just north of Dallas, is the Interurban Railway Museum, located in a substation building of the Texas Electric.
Outside the building is the body of car 360, a parlor/RPO combine built in 1911. After the line quit, it was reduced to a farmer's shed for many years, but has been cosmetically restored, and the partly-restored interior is open for guided tours.
The building itself holds a number of excellent displays on various aspects of interurbans, including an operating model layout with buildings carefully patterned after those in early Plano.
They've done their best to restore the interior. There are three of these parlor car bucket seats, for instance, which I assume were obtained locally, to give an idea of what the interior would have looked like. Some aspects of the car are open to question, I suppose, but on the whole this is quite an impressive achievement for a small town. The museum is located a block from the DART station, and the line from Dallas has some definite interurban-like aspects. It's well worth a visit.