GC Laser has an N-scale icing platform kit.
As I recall, these go in and out of production at Walthers. If you want that kit and can wait, chances are it will be produced again in the future. Check train shows, too.
There are other manufacturers, too. The Walthers model is nice, but if you look around you may find another that's even better, particularly if you're willing to take on a craftsman kit, which really isn't that much more work than the Walthers kit. I built one of the HO-scale ice house and platform kits, and I don't think a craftsman kit is all that much harder.
Update - Bar Mills N-scale platform is available at M.B. Klein (www.modeltrainstuff.com) right now.
It takes an iron man to play with a toy iron horse.
Walthers has discontinued their Ice House & Platform kit # 933 3245 (N scale). I need one to justify the
50 plus micro train reefers I already have! Anyone have one for sale...kit or assembled.
illiniray