Recommendations Sought for 15mm Train and Middle East City Walls

[ragbones]

Looking for recommendations for a train with flat cars and cars with low sides, suitable for use with 15mm figures in games set in Egypt and the Sudan, 1882- 1895. I've looked at HO scale trains but they appeared to be a tad small although the track looked like a good size.

I'm also looking for Middle East-style 15mm scale walls, towers, and gatehouse for use as the city fortifications for Khartoum - at least the 'Hollywood' version. I have plenty of buildings from Crescent Moon, Miniature Building Authority, and others for the town itself. Anyone know of commercially available buildings?