A new set of 2 brick chimneys:
1. light brick
2. darker brick both found under Decor/Misc. Decor, both cost 0. Use the cheat code "moveobjects on". The chimney facing front was placed on a single wall strip above the fire place to be able to show above the roof. Also it's rotated 90 degrees which looks better as it contours the gradient of the front roof. You need "Late Night" or a later Expansion Pack for the chimney to show up in your game.