In addition to the Märklin track and the Micro Trains roadbed track, Peco manufactures flex track and rail joiners for Z-Scale.  IBL manufactures cork roadbed elements for Z-Scale which are useful when using the Woodland Scenics Terrain System; the roadbed is hot glued onto the track risers of this system, and the Märklin track is attached to the roadbed pieces. IBL is also a source for the manufactured layout forms discussed here.  I also have a good number of his display cases that hold my train and toy collection; they’re well built and attractive.