The American Z line listings can be found here.

If you decide to paint your own stuff then use Scalecoat D&H yellow and Scalecoat B&O royal blue for ARR blue and yellow.

Decals for all scales: Circus City Decals, PO Box 228 Baraboo, WI 53913 https://circuscitydecals.com/

Harald Thom-Freudenreich has released an Alaska Railroad two car freight set. Anyone interested can contact Harald by email for information on how to reserve a set ($140). He is also planning to release an Z scale PS2-cd grain hopper at the end of March 2007 plus a future Z scale locomotive.

Also this set is available: Alaska Railroad "Mikado" steam locomotive with tender, three 55 ton USRA twin hoppers and one caboose. Produced in an one time series in a very limited numbers FR item number ZF007 & ZF325j

In 1993 Märklin produced in a MHI One-time series the Alaska Railroad Train Set to celebrate its 70 year anniversary.  The three piece set contains:

#8819  - Three-Parts Diesel-Electro locomotive F7 of the Alaska Railroad. Wheel arrangement Bo'Bo'+Bo'Bo'+Bo'Bo', blue/yellow, double headlight in front, lettering "Alaska", train numbers 1500 - 1503 - 1502, outside parts with engine, coupler 2, inside part with stiff short couplers, lighted number boards.

#8686  - "Alaska" freight-car set A: ARR caboose, blue/yellow;  ARR boxcar, blue/yellow. ARR tank car, silver; Canadian National gondola, dark-brown.

#8687  - "Alaska" freight-car set B: ARR boxcar, blue/yellow; BASF Wyandotte tank car, olive-green tank, black BASF logo; ARR gondola, black.

Photographs of Thorsten Loth's 33" x 20" Z scale layout:

Caboose by the river

Locomotives and boxcars

Locomotive crossing the river

A beautiful night scene

Thanks for the information on Z scale goes to Thorsten Loth from Ratingen, Germany