This locomotive can be purchased from LEGO Factory (Shop-At-Home):
http://factory.lego.com

Choose LXF file based on # motors (not-included) you want to use:

for two motors:  dan_147_mma_loco_modified.lxf
for one motor:   dan_147_mma_loco_modified_1t.lxf
for no  motors:  dan_147_mma_loco_modified_2t.lxf

LXF Files have Organized Building Steps

Main Locomotive Design by Daniel Aubin
Additional Design Details by Paul S. D'Urbano

Questions: durbano@optonline.net