The MDC website has information about a HO scale EMD Model 40.Their website calls it the “Critter” and says it will go on sale in November.Here is a link: www.mdcroundhouse.com/ this is a small 4 wheeled industrial switcher.
The Critter is also shown in MDCs Model Railroader November 2003 issue advertisement on page 15, with an MSRP of $82.50. RMC magazine, November 2003 issue, page 8, has the same advertisement.